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From "Grzegorz Grzybek (Confluence)" <conflue...@apache.org>
Subject [CONF] Apache Camel > Using PropertyPlaceholder
Date Tue, 22 Jul 2014 07:16:00 GMT
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                                                            <a href="    https://cwiki.apache.org/confluence/display/~gr.grzybek " style="color:#326ca6;text-decoration:none;; color: #326ca6; text-decoration: none">Grzegorz Grzybek</a> edited the page:
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                                                    <td valign="top" style="font-size: 13px"> <h2 id="email-title-heading" style="font-size: 16px; line-height: 20px; min-height: 20px; margin: 0; padding: 0"> <a href="https://cwiki.apache.org/confluence/display/CAMEL/Using+PropertyPlaceholder" style="color: #326ca6; text-decoration: none"> <img class="icon" src="cid:page-icon" alt="" style="border: 0; padding: 0 5px 0 0; text-align: left; vertical-align: middle" /> <strong style="font-size:16px;line-height:20px;vertical-align:top;">Using PropertyPlaceholder</strong> </a> </h2> </td>
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                                            <p class="aui-message info" style="font-size: 13px; margin: 1em 0; padding: 8px; background-color: #e0f0ff; border: 1px solid #9eb6d4"> <b>Comment:</b> Information about propertyPrefix/Suffix - they're resolvable against system/env properties </p>
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                                                    <p class="diff-context-placeholder" style="font-size: 13px">...</p>
                                                    <p class="diff-block-context" style="font-size: 13px">The <code style="font-size: 13px">PropertiesResolver</code> need to know a location(s) where to resolve the properties. You can define 1 to many locations. If you define the location in a single String property you can separate multiple locations with comma such as:</p>
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                                                                                <td style="background-color: #fafafa; padding: 0 0 0 5px; font-size: 12px; text-align: left;; font-size: 13px">java</td>
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                                                                <td class="diff-macro-body" style="background-color: #fff;border: 1px solid #dddddd;padding: 10px;; font-size: 13px"> <pre style="font-size: 13px">
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</span>pc.setLocation(&quot;com/mycompany/myprop.properties,com/mycompany/other.properties&quot;);
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                                                    <p class="diff-context-placeholder" style="font-size: 13px">...</p>
                                                    <p class="diff-block-context" style="font-size: 13px">The location now supports using placeholders for JVM system properties and OS environments variables.</p>
                                                    <p class="diff-block-context" style="font-size: 13px">For example:</p>
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</span>location=file:${karaf.home}/etc/foo.properties
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                                                    <p class="diff-context-placeholder" style="font-size: 13px">...</p>
                                                    <p class="diff-block-context" style="font-size: 13px">To use an OS environment variable instead you would have to prefix with env:</p>
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                                                                <td class="diff-macro-body" style="background-color: #fff;border: 1px solid #dddddd;padding: 10px;; font-size: 13px"> <pre style="font-size: 13px">
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</span>location=file:${env:APP_HOME}/etc/foo.properties
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                                                    <p class="diff-context-placeholder" style="font-size: 13px">...</p>
                                                    <p class="diff-block-context" style="font-size: 13px">You can have multiple placeholders in the same location, such as:</p>
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</span>location=file:${env:APP_HOME}/etc/${prop.name}.properties
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                                                    <h4 id="UsingPropertyPlaceholder-Usingsystemandenvironmentvariablestoconfigurepropertyprefixesandsuffixes" class="diff-block-target diff-block-context"> <span class="diff-html-added" id="added-diff-0" style="font-size: 100%; background-color: #ddfade;">Using system and environment variables to configure property prefixes and suffixes</span> </h4>
                                                    <p class="diff-block-target diff-block-context" style="font-size: 13px"> <strong><span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">Available as of Camel 2.12.5, 2.13.3, 2.14.0</span></strong> </p>
                                                    <p class="diff-block-target diff-block-context" style="font-size: 13px"> <code style="font-size: 13px"><span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">propertyPrefix</span></code><span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">, </span><code style="font-size: 13px"><span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">propertySuffix</span></code><span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;"> configuration properties support using placeholders for JVM system properties and OS environments variables.</span> </p>
                                                    <p class="diff-block-target diff-block-context" style="font-size: 13px"> <span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">For example. if&nbsp;</span><code style="font-size: 13px"><span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">PropertiesComponent</span></code><span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;"> is configured with the following properties file:</span> </p>
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                                                                <td class="diff-macro-body" style="background-color: #fff;border: 1px solid #dddddd;padding: 10px;; font-size: 13px"> <pre style="font-size: 13px">
<span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">dev.endpoint = result1
test.endpoint = result2</span>
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                                                    <p class="diff-block-target diff-block-context" style="font-size: 13px"> <span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">Then with the following route definition:</span> </p>
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                                                                                <td style="background-color: #fafafa; padding: 0 0 0 5px; font-size: 12px; text-align: left;; font-size: 13px"><span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">java</span></td>
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                                                                <td class="diff-macro-body" style="background-color: #fff;border: 1px solid #dddddd;padding: 10px;; font-size: 13px"> <pre style="font-size: 13px">
<span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">PropertiesComponent pc = context.getComponent(&quot;properties&quot;, PropertiesComponent.class);
pc.setPropertyPrefix(&quot;${stage}.&quot;);
// ...
context.addRoutes(new RouteBuilder() {
    @Override
    public void configure() throws Exception {
        from(&quot;direct:start&quot;).to(&quot;properties:mock:{{endpoint}}&quot;);
    }
});</span>
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                                                    <p class="diff-block-target diff-block-context" style="font-size: 13px"> <span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">it is possible to change the target endpoint by changing system property&nbsp;</span><code style="font-size: 13px"><span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">stage</span></code><span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;"> either to&nbsp;</span><code style="font-size: 13px"><span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">dev</span></code><span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;"> (the message will be routed to&nbsp;</span><code style="font-size: 13px"><span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">mock:result1</span></code><span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">) or&nbsp;</span><code style="font-size: 13px"><span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">test</span></code><span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;"> (the message will be routed to&nbsp;</span><code style="font-size: 13px"><span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">mock:result2</span></code><span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">).</span> </p>
                                                    <h3 id="UsingPropertyPlaceholder-ConfiguringinJavaDSL" class="diff-block-context">Configuring in Java DSL</h3>
                                                    <p class="diff-block-context" style="font-size: 13px">You have to create and register the <code style="font-size: 13px">PropertiesComponent</code> under the name <code style="font-size: 13px">properties</code> such as:</p>
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                                                                    <table>
                                                                        <tbody>
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                                                                                <td style="background-color: #fafafa; padding: 0 0 0 5px; font-size: 12px; text-align: left;; font-size: 13px"></td>
                                                                                <td style="background-color: #fafafa; padding: 0 0 0 5px; font-size: 12px; text-align: left;; font-size: 13px">java</td>
                                                                            </tr>
                                                                        </tbody>
                                                                    </table> </td>
                                                            </tr>
                                                        </tbody>
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                                                            <tr>
                                                                <td class="diff-macro-body" style="background-color: #fff;border: 1px solid #dddddd;padding: 10px;; font-size: 13px"> <pre style="font-size: 13px">
<span class="diff-html-removed" id="removed-diff-4" style="font-size: 100%; background-color: #ffe7e7; text-decoration: line-through;">
</span>PropertiesComponent pc = new PropertiesComponent();
pc.setLocation(&quot;classpath:com/mycompany/myprop.properties&quot;);
context.addComponent(&quot;properties&quot;, pc);
</pre> </td>
                                                            </tr>
                                                        </tbody>
                                                    </table>
                                                    <p class="diff-context-placeholder" style="font-size: 13px">...</p>
                                                    <p class="diff-block-context" style="font-size: 13px">Spring XML offers two variations to configure. You can define a spring bean as a <code style="font-size: 13px">PropertiesComponent</code> which resembles the way done in Java DSL. Or you can use the <code style="font-size: 13px">&lt;propertyPlaceholder&gt;</code> tag.</p>
                                                    <table class="diff-macro diff-block-target" style="background-color: #f0f0f0;border: 1px solid #dddddd;margin: 10px 1px;padding: 0 2px 2px;width: 100%;">
                                                        <thead>
                                                            <tr>
                                                                <th class="diff-macro-title" style="background-color: transparent; text-align: left; font-weight: normal;padding: 5px;; font-size: 13px"><span class="icon macro-placeholder-icon" style="background-color: ;line-height: 20px;"><img src="https://cwiki.apache.org/confluence/s/en_GB-1988229788/4109/76e0dbb30bc8580e459c201f3535d84f9283a9ac.1/_/plugins/servlet/confluence/placeholder/macro-icon?name=code" style="padding-right: 5px; vertical-align: text-bottom;" /> </span>Code Block</th>
                                                            </tr>
                                                        </thead>
                                                        <tbody>
                                                            <tr>
                                                                <td class="diff-macro-properties" style="background-color: #fafafa; padding: 0 0 0 5px; font-size: 12px; text-align: left;padding: 0; border: 1px solid #dddddd;; font-size: 13px">
                                                                    <table>
                                                                        <tbody>
                                                                            <tr>
                                                                                <td style="background-color: #fafafa; padding: 0 0 0 5px; font-size: 12px; text-align: left;; font-size: 13px"></td>
                                                                                <td style="background-color: #fafafa; padding: 0 0 0 5px; font-size: 12px; text-align: left;; font-size: 13px">xml</td>
                                                                            </tr>
                                                                        </tbody>
                                                                    </table> </td>
                                                            </tr>
                                                        </tbody>
                                                        <tbody>
                                                            <tr>
                                                                <td class="diff-macro-body" style="background-color: #fff;border: 1px solid #dddddd;padding: 10px;; font-size: 13px"> <pre style="font-size: 13px">
<span class="diff-html-removed" id="removed-diff-5" style="font-size: 100%; background-color: #ffe7e7; text-decoration: line-through;">
</span>&lt;bean id=&quot;properties&quot; class=&quot;org.apache.camel.component.properties.PropertiesComponent&quot;&gt;
    &lt;property name=&quot;location&quot; value=&quot;classpath:com/mycompany/myprop.properties&quot;/&gt;
&lt;/bean&gt;
</pre> </td>
                                                            </tr>
                                                        </tbody>
                                                    </table>
                                                    <p class="diff-block-context" style="font-size: 13px">Using the <code style="font-size: 13px">&lt;propertyPlaceholder&gt;</code> tag makes the configuration a bit more fresh such as:</p>
                                                    <table class="diff-macro diff-block-target" style="background-color: #f0f0f0;border: 1px solid #dddddd;margin: 10px 1px;padding: 0 2px 2px;width: 100%;">
                                                        <thead>
                                                            <tr>
                                                                <th class="diff-macro-title" style="background-color: transparent; text-align: left; font-weight: normal;padding: 5px;; font-size: 13px"><span class="icon macro-placeholder-icon" style="background-color: ;line-height: 20px;"><img src="https://cwiki.apache.org/confluence/s/en_GB-1988229788/4109/76e0dbb30bc8580e459c201f3535d84f9283a9ac.1/_/plugins/servlet/confluence/placeholder/macro-icon?name=code" style="padding-right: 5px; vertical-align: text-bottom;" /> </span>Code Block</th>
                                                            </tr>
                                                        </thead>
                                                        <tbody>
                                                            <tr>
                                                                <td class="diff-macro-properties" style="background-color: #fafafa; padding: 0 0 0 5px; font-size: 12px; text-align: left;padding: 0; border: 1px solid #dddddd;; font-size: 13px">
                                                                    <table>
                                                                        <tbody>
                                                                            <tr>
                                                                                <td style="background-color: #fafafa; padding: 0 0 0 5px; font-size: 12px; text-align: left;; font-size: 13px"></td>
                                                                                <td style="background-color: #fafafa; padding: 0 0 0 5px; font-size: 12px; text-align: left;; font-size: 13px">xml</td>
                                                                            </tr>
                                                                        </tbody>
                                                                    </table> </td>
                                                            </tr>
                                                        </tbody>
                                                        <tbody>
                                                            <tr>
                                                                <td class="diff-macro-body" style="background-color: #fff;border: 1px solid #dddddd;padding: 10px;; font-size: 13px"> <pre style="font-size: 13px">
<span class="diff-html-removed" id="removed-diff-6" style="font-size: 100%; background-color: #ffe7e7; text-decoration: line-through;">
</span>&lt;camelContext ...&gt;
   &lt;propertyPlaceholder id=&quot;properties&quot; location=&quot;com/mycompany/myprop.properties&quot;/&gt;
&lt;/camelContext&gt;
</pre> </td>
                                                            </tr>
                                                        </tbody>
                                                    </table>
                                                    <p class="diff-context-placeholder" style="font-size: 13px">...</p>
                                                    <p class="diff-block-context" style="font-size: 13px">Then you could setup the <a class="confluence-link unresolved" href="#" style="color: #326ca6; text-decoration: none">Properties</a> component as follows:</p>
                                                    <table class="diff-macro diff-block-target" style="background-color: #f0f0f0;border: 1px solid #dddddd;margin: 10px 1px;padding: 0 2px 2px;width: 100%;">
                                                        <thead>
                                                            <tr>
                                                                <th class="diff-macro-title" style="background-color: transparent; text-align: left; font-weight: normal;padding: 5px;; font-size: 13px"><span class="icon macro-placeholder-icon" style="background-color: ;line-height: 20px;"><img src="https://cwiki.apache.org/confluence/s/en_GB-1988229788/4109/76e0dbb30bc8580e459c201f3535d84f9283a9ac.1/_/plugins/servlet/confluence/placeholder/macro-icon?name=code" style="padding-right: 5px; vertical-align: text-bottom;" /> </span>Code Block</th>
                                                            </tr>
                                                        </thead>
                                                        <tbody>
                                                            <tr>
                                                                <td class="diff-macro-properties" style="background-color: #fafafa; padding: 0 0 0 5px; font-size: 12px; text-align: left;padding: 0; border: 1px solid #dddddd;; font-size: 13px">
                                                                    <table>
                                                                        <tbody>
                                                                            <tr>
                                                                                <td style="background-color: #fafafa; padding: 0 0 0 5px; font-size: 12px; text-align: left;; font-size: 13px"></td>
                                                                                <td style="background-color: #fafafa; padding: 0 0 0 5px; font-size: 12px; text-align: left;; font-size: 13px">xml</td>
                                                                            </tr>
                                                                        </tbody>
                                                                    </table> </td>
                                                            </tr>
                                                        </tbody>
                                                        <tbody>
                                                            <tr>
                                                                <td class="diff-macro-body" style="background-color: #fff;border: 1px solid #dddddd;padding: 10px;; font-size: 13px"> <pre style="font-size: 13px">
<span class="diff-html-removed" id="removed-diff-7" style="font-size: 100%; background-color: #ffe7e7; text-decoration: line-through;"> </span>&lt;propertyPlaceholder id=&quot;properties&quot; location=&quot;ref:myProperties&quot;/&gt;
</pre> </td>
                                                            </tr>
                                                        </tbody>
                                                    </table>
                                                    <p class="diff-context-placeholder" style="font-size: 13px">...</p>
                                                    <p class="diff-block-context" style="font-size: 13px">When using property placeholders in the endpoint URIs you can either use the <code style="font-size: 13px">properties:</code> component or define the placeholders directly in the URI. We will show example of both cases, starting with the former.</p>
                                                    <table class="diff-macro diff-block-target" style="background-color: #f0f0f0;border: 1px solid #dddddd;margin: 10px 1px;padding: 0 2px 2px;width: 100%;">
                                                        <thead>
                                                            <tr>
                                                                <th class="diff-macro-title" style="background-color: transparent; text-align: left; font-weight: normal;padding: 5px;; font-size: 13px"><span class="icon macro-placeholder-icon" style="background-color: ;line-height: 20px;"><img src="https://cwiki.apache.org/confluence/s/en_GB-1988229788/4109/76e0dbb30bc8580e459c201f3535d84f9283a9ac.1/_/plugins/servlet/confluence/placeholder/macro-icon?name=code" style="padding-right: 5px; vertical-align: text-bottom;" /> </span>Code Block</th>
                                                            </tr>
                                                        </thead>
                                                        <tbody>
                                                            <tr>
                                                                <td class="diff-macro-body" style="background-color: #fff;border: 1px solid #dddddd;padding: 10px;; font-size: 13px"> <pre style="font-size: 13px">
<span class="diff-html-removed" id="removed-diff-8" style="font-size: 100%; background-color: #ffe7e7; text-decoration: line-through;">
</span>// properties
cool.end=mock:result

// route
from(&quot;direct:start&quot;).to(&quot;properties:{{cool.end}}&quot;);
</pre> </td>
                                                            </tr>
                                                        </tbody>
                                                    </table>
                                                    <p class="diff-block-context" style="font-size: 13px">You can also use placeholders as a part of the endpoint uri:</p>
                                                    <table class="diff-macro diff-block-target" style="background-color: #f0f0f0;border: 1px solid #dddddd;margin: 10px 1px;padding: 0 2px 2px;width: 100%;">
                                                        <thead>
                                                            <tr>
                                                                <th class="diff-macro-title" style="background-color: transparent; text-align: left; font-weight: normal;padding: 5px;; font-size: 13px"><span class="icon macro-placeholder-icon" style="background-color: ;line-height: 20px;"><img src="https://cwiki.apache.org/confluence/s/en_GB-1988229788/4109/76e0dbb30bc8580e459c201f3535d84f9283a9ac.1/_/plugins/servlet/confluence/placeholder/macro-icon?name=code" style="padding-right: 5px; vertical-align: text-bottom;" /> </span>Code Block</th>
                                                            </tr>
                                                        </thead>
                                                        <tbody>
                                                            <tr>
                                                                <td class="diff-macro-body" style="background-color: #fff;border: 1px solid #dddddd;padding: 10px;; font-size: 13px"> <pre style="font-size: 13px">
<span class="diff-html-removed" id="removed-diff-9" style="font-size: 100%; background-color: #ffe7e7; text-decoration: line-through;">
</span>// properties
cool.foo=result

// route
from(&quot;direct:start&quot;).to(&quot;properties:mock:{{cool.foo}}&quot;);
</pre> </td>
                                                            </tr>
                                                        </tbody>
                                                    </table>
                                                    <p class="diff-context-placeholder" style="font-size: 13px">...</p>
                                                    <p class="diff-block-context" style="font-size: 13px">You can also have properties with refer to each other such as:</p>
                                                    <table class="diff-macro diff-block-target" style="background-color: #f0f0f0;border: 1px solid #dddddd;margin: 10px 1px;padding: 0 2px 2px;width: 100%;">
                                                        <thead>
                                                            <tr>
                                                                <th class="diff-macro-title" style="background-color: transparent; text-align: left; font-weight: normal;padding: 5px;; font-size: 13px"><span class="icon macro-placeholder-icon" style="background-color: ;line-height: 20px;"><img src="https://cwiki.apache.org/confluence/s/en_GB-1988229788/4109/76e0dbb30bc8580e459c201f3535d84f9283a9ac.1/_/plugins/servlet/confluence/placeholder/macro-icon?name=code" style="padding-right: 5px; vertical-align: text-bottom;" /> </span>Code Block</th>
                                                            </tr>
                                                        </thead>
                                                        <tbody>
                                                            <tr>
                                                                <td class="diff-macro-body" style="background-color: #fff;border: 1px solid #dddddd;padding: 10px;; font-size: 13px"> <pre style="font-size: 13px">
<span class="diff-html-removed" id="removed-diff-10" style="font-size: 100%; background-color: #ffe7e7; text-decoration: line-through;">
</span>// properties
cool.foo=result
cool.concat=mock:{{cool.foo}}

// route
from(&quot;direct:start&quot;).to(&quot;properties:mock:{{cool.concat}}&quot;);
</pre> </td>
                                                            </tr>
                                                        </tbody>
                                                    </table>
                                                    <p class="diff-context-placeholder" style="font-size: 13px">...</p>
                                                    <p class="diff-block-context" style="font-size: 13px">The <code style="font-size: 13px">properties:</code> component also offers you to override and provide a location in the given uri using the <code style="font-size: 13px">locations</code> option:</p>
                                                    <table class="diff-macro diff-block-target" style="background-color: #f0f0f0;border: 1px solid #dddddd;margin: 10px 1px;padding: 0 2px 2px;width: 100%;">
                                                        <thead>
                                                            <tr>
                                                                <th class="diff-macro-title" style="background-color: transparent; text-align: left; font-weight: normal;padding: 5px;; font-size: 13px"><span class="icon macro-placeholder-icon" style="background-color: ;line-height: 20px;"><img src="https://cwiki.apache.org/confluence/s/en_GB-1988229788/4109/76e0dbb30bc8580e459c201f3535d84f9283a9ac.1/_/plugins/servlet/confluence/placeholder/macro-icon?name=code" style="padding-right: 5px; vertical-align: text-bottom;" /> </span>Code Block</th>
                                                            </tr>
                                                        </thead>
                                                        <tbody>
                                                            <tr>
                                                                <td class="diff-macro-body" style="background-color: #fff;border: 1px solid #dddddd;padding: 10px;; font-size: 13px"> <pre style="font-size: 13px">
<span class="diff-html-removed" id="removed-diff-11" style="font-size: 100%; background-color: #ffe7e7; text-decoration: line-through;"> </span>from(&quot;direct:start&quot;).to(&quot;properties:bar.end?locations=com/mycompany/bar.properties&quot;);
</pre> </td>
                                                            </tr>
                                                        </tbody>
                                                    </table>
                                                    <p class="diff-context-placeholder" style="font-size: 13px">...</p>
                                                    <p class="diff-block-context" style="font-size: 13px">You can also use property placeholders directly in the endpoint uris without having to use <code style="font-size: 13px">properties:</code>.</p>
                                                    <table class="diff-macro diff-block-target" style="background-color: #f0f0f0;border: 1px solid #dddddd;margin: 10px 1px;padding: 0 2px 2px;width: 100%;">
                                                        <thead>
                                                            <tr>
                                                                <th class="diff-macro-title" style="background-color: transparent; text-align: left; font-weight: normal;padding: 5px;; font-size: 13px"><span class="icon macro-placeholder-icon" style="background-color: ;line-height: 20px;"><img src="https://cwiki.apache.org/confluence/s/en_GB-1988229788/4109/76e0dbb30bc8580e459c201f3535d84f9283a9ac.1/_/plugins/servlet/confluence/placeholder/macro-icon?name=code" style="padding-right: 5px; vertical-align: text-bottom;" /> </span>Code Block</th>
                                                            </tr>
                                                        </thead>
                                                        <tbody>
                                                            <tr>
                                                                <td class="diff-macro-body" style="background-color: #fff;border: 1px solid #dddddd;padding: 10px;; font-size: 13px"> <pre style="font-size: 13px">
<span class="diff-html-removed" id="removed-diff-12" style="font-size: 100%; background-color: #ffe7e7; text-decoration: line-through;">
</span>// properties
cool.foo=result

// route
from(&quot;direct:start&quot;).to(&quot;mock:{{cool.foo}}&quot;);
</pre> </td>
                                                            </tr>
                                                        </tbody>
                                                    </table>
                                                    <p class="diff-block-context" style="font-size: 13px">And you can use them in multiple wherever you want them:</p>
                                                    <table class="diff-macro diff-block-target" style="background-color: #f0f0f0;border: 1px solid #dddddd;margin: 10px 1px;padding: 0 2px 2px;width: 100%;">
                                                        <thead>
                                                            <tr>
                                                                <th class="diff-macro-title" style="background-color: transparent; text-align: left; font-weight: normal;padding: 5px;; font-size: 13px"><span class="icon macro-placeholder-icon" style="background-color: ;line-height: 20px;"><img src="https://cwiki.apache.org/confluence/s/en_GB-1988229788/4109/76e0dbb30bc8580e459c201f3535d84f9283a9ac.1/_/plugins/servlet/confluence/placeholder/macro-icon?name=code" style="padding-right: 5px; vertical-align: text-bottom;" /> </span>Code Block</th>
                                                            </tr>
                                                        </thead>
                                                        <tbody>
                                                            <tr>
                                                                <td class="diff-macro-body" style="background-color: #fff;border: 1px solid #dddddd;padding: 10px;; font-size: 13px"> <pre style="font-size: 13px">
<span class="diff-html-removed" id="removed-diff-13" style="font-size: 100%; background-color: #ffe7e7; text-decoration: line-through;">
</span>// properties
cool.start=direct:start
cool.showid=true
cool.result=result

// route
from(&quot;{{cool.start}}&quot;)
    .to(&quot;log:{{cool.start}}?showBodyType=false&amp;showExchangeId={{cool.showid}}&quot;)
    .to(&quot;mock:{{cool.result}}&quot;);
</pre> </td>
                                                            </tr>
                                                        </tbody>
                                                    </table>
                                                    <p class="diff-block-context" style="font-size: 13px">You can also your property placeholders when using <a class="confluence-link unresolved" href="#" style="color: #326ca6; text-decoration: none">ProducerTemplate</a> for example:</p>
                                                    <table class="diff-macro diff-block-target" style="background-color: #f0f0f0;border: 1px solid #dddddd;margin: 10px 1px;padding: 0 2px 2px;width: 100%;">
                                                        <thead>
                                                            <tr>
                                                                <th class="diff-macro-title" style="background-color: transparent; text-align: left; font-weight: normal;padding: 5px;; font-size: 13px"><span class="icon macro-placeholder-icon" style="background-color: ;line-height: 20px;"><img src="https://cwiki.apache.org/confluence/s/en_GB-1988229788/4109/76e0dbb30bc8580e459c201f3535d84f9283a9ac.1/_/plugins/servlet/confluence/placeholder/macro-icon?name=code" style="padding-right: 5px; vertical-align: text-bottom;" /> </span>Code Block</th>
                                                            </tr>
                                                        </thead>
                                                        <tbody>
                                                            <tr>
                                                                <td class="diff-macro-body" style="background-color: #fff;border: 1px solid #dddddd;padding: 10px;; font-size: 13px"> <pre style="font-size: 13px">
<span class="diff-html-removed" id="removed-diff-14" style="font-size: 100%; background-color: #ffe7e7; text-decoration: line-through;">
</span>template.sendBody(&quot;{{cool.start}}&quot;, &quot;Hello World&quot;);
</pre> </td>
                                                            </tr>
                                                        </tbody>
                                                    </table>
                                                    <p class="diff-context-placeholder" style="font-size: 13px">...</p>
                                                    <p class="diff-block-context" style="font-size: 13px">The <a class="confluence-link unresolved" href="#" style="color: #326ca6; text-decoration: none">Simple</a> language now also support using property placeholders, for example in the route below:</p>
                                                    <table class="diff-macro diff-block-target" style="background-color: #f0f0f0;border: 1px solid #dddddd;margin: 10px 1px;padding: 0 2px 2px;width: 100%;">
                                                        <thead>
                                                            <tr>
                                                                <th class="diff-macro-title" style="background-color: transparent; text-align: left; font-weight: normal;padding: 5px;; font-size: 13px"><span class="icon macro-placeholder-icon" style="background-color: ;line-height: 20px;"><img src="https://cwiki.apache.org/confluence/s/en_GB-1988229788/4109/76e0dbb30bc8580e459c201f3535d84f9283a9ac.1/_/plugins/servlet/confluence/placeholder/macro-icon?name=code" style="padding-right: 5px; vertical-align: text-bottom;" /> </span>Code Block</th>
                                                            </tr>
                                                        </thead>
                                                        <tbody>
                                                            <tr>
                                                                <td class="diff-macro-body" style="background-color: #fff;border: 1px solid #dddddd;padding: 10px;; font-size: 13px"> <pre style="font-size: 13px">
<span class="diff-html-removed" id="removed-diff-15" style="font-size: 100%; background-color: #ffe7e7; text-decoration: line-through;">
</span>// properties
cheese.quote=Camel rocks

// route
from(&quot;direct:start&quot;)
    .transform().simple(&quot;Hi ${body} do you think ${properties:cheese.quote}?&quot;);
</pre> </td>
                                                            </tr>
                                                        </tbody>
                                                    </table>
                                                    <p class="diff-block-context" style="font-size: 13px">You can also specify the location in the <a class="confluence-link unresolved" href="#" style="color: #326ca6; text-decoration: none">Simple</a> language for example:</p>
                                                    <table class="diff-macro diff-block-target" style="background-color: #f0f0f0;border: 1px solid #dddddd;margin: 10px 1px;padding: 0 2px 2px;width: 100%;">
                                                        <thead>
                                                            <tr>
                                                                <th class="diff-macro-title" style="background-color: transparent; text-align: left; font-weight: normal;padding: 5px;; font-size: 13px"><span class="icon macro-placeholder-icon" style="background-color: ;line-height: 20px;"><img src="https://cwiki.apache.org/confluence/s/en_GB-1988229788/4109/76e0dbb30bc8580e459c201f3535d84f9283a9ac.1/_/plugins/servlet/confluence/placeholder/macro-icon?name=code" style="padding-right: 5px; vertical-align: text-bottom;" /> </span>Code Block</th>
                                                            </tr>
                                                        </thead>
                                                        <tbody>
                                                            <tr>
                                                                <td class="diff-macro-body" style="background-color: #fff;border: 1px solid #dddddd;padding: 10px;; font-size: 13px"> <pre style="font-size: 13px">
<span class="diff-html-removed" id="removed-diff-16" style="font-size: 100%; background-color: #ffe7e7; text-decoration: line-through;">
</span>// bar.properties
bar.quote=Beer tastes good

// route
from(&quot;direct:start&quot;)
    .transform().simple(&quot;Hi ${body}. ${properties:com/mycompany/bar.properties:bar.quote}.&quot;);
</pre> </td>
                                                            </tr>
                                                        </tbody>
                                                    </table>
                                                    <p class="diff-context-placeholder" style="font-size: 13px">...</p>
                                                    <p class="diff-block-context" style="font-size: 13px"> <strong>Available as of Camel 2.5</strong> <br /> It is possible to override a property value at runtime using a JVM System property without the need to restart the application to pick up the change. This may also be accomplished from the command line by creating a JVM System property of the same name as the property it replaces with a new value. An example of this is given below</p>
                                                    <table class="diff-macro diff-block-target" style="background-color: #f0f0f0;border: 1px solid #dddddd;margin: 10px 1px;padding: 0 2px 2px;width: 100%;">
                                                        <thead>
                                                            <tr>
                                                                <th class="diff-macro-title" style="background-color: transparent; text-align: left; font-weight: normal;padding: 5px;; font-size: 13px"><span class="icon macro-placeholder-icon" style="background-color: ;line-height: 20px;"><img src="https://cwiki.apache.org/confluence/s/en_GB-1988229788/4109/76e0dbb30bc8580e459c201f3535d84f9283a9ac.1/_/plugins/servlet/confluence/placeholder/macro-icon?name=code" style="padding-right: 5px; vertical-align: text-bottom;" /> </span>Code Block</th>
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                                                                <td class="diff-macro-body" style="background-color: #fff;border: 1px solid #dddddd;padding: 10px;; font-size: 13px"> <pre style="font-size: 13px">
<span class="diff-html-removed" id="removed-diff-17" style="font-size: 100%; background-color: #ffe7e7; text-decoration: line-through;">
</span>PropertiesComponent pc = context.getComponent(&quot;properties&quot;, PropertiesComponent.class);
pc.setCache(false);

System.setProperty(&quot;cool.end&quot;, &quot;mock:override&quot;);
System.setProperty(&quot;cool.result&quot;, &quot;override&quot;);

context.addRoutes(new RouteBuilder() {
    @Override
    public void configure() throws Exception {
        from(&quot;direct:start&quot;).to(&quot;properties:cool.end&quot;);
        from(&quot;direct:foo&quot;).to(&quot;properties:mock:{{cool.result}}&quot;);
    }
});
context.start();

getMockEndpoint(&quot;mock:override&quot;).expectedMessageCount(2);

template.sendBody(&quot;direct:start&quot;, &quot;Hello World&quot;);
template.sendBody(&quot;direct:foo&quot;, &quot;Hello Foo&quot;);

System.clearProperty(&quot;cool.end&quot;);
System.clearProperty(&quot;cool.result&quot;);

assertMockEndpointsSatisfied();
</pre> </td>
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                                                    </table>
                                                    <p class="diff-context-placeholder" style="font-size: 13px">...</p>
                                                    <p class="diff-block-context" style="font-size: 13px">In our properties file we have the value defined as</p>
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                                                            <tr>
                                                                <th class="diff-macro-title" style="background-color: transparent; text-align: left; font-weight: normal;padding: 5px;; font-size: 13px"><span class="icon macro-placeholder-icon" style="background-color: ;line-height: 20px;"><img src="https://cwiki.apache.org/confluence/s/en_GB-1988229788/4109/76e0dbb30bc8580e459c201f3535d84f9283a9ac.1/_/plugins/servlet/confluence/placeholder/macro-icon?name=code" style="padding-right: 5px; vertical-align: text-bottom;" /> </span>Code Block</th>
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                                                                <td class="diff-macro-body" style="background-color: #fff;border: 1px solid #dddddd;padding: 10px;; font-size: 13px"> <pre style="font-size: 13px">
<span class="diff-html-removed" id="removed-diff-18" style="font-size: 100%; background-color: #ffe7e7; text-decoration: line-through;">
</span>stop=true
</pre> </td>
                                                            </tr>
                                                        </tbody>
                                                    </table>
                                                    <h3 id="UsingPropertyPlaceholder-UsingpropertyplaceholderintheJavaDSL" class="diff-block-context">Using property placeholder in the Java DSL</h3>
                                                    <p class="diff-context-placeholder" style="font-size: 13px">...</p>
                                                    <p class="diff-block-context" style="font-size: 13px">Notice how we use the <code style="font-size: 13px">blueprint</code> scheme to refer to the OSGi blueprint placeholder by its id. This allows you to mix and match, for example you can also have additional schemes in the location. For example to load a file from the classpath you can do:</p>
                                                    <table class="diff-macro diff-block-target" style="background-color: #f0f0f0;border: 1px solid #dddddd;margin: 10px 1px;padding: 0 2px 2px;width: 100%;">
                                                        <thead>
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                                                                <th class="diff-macro-title" style="background-color: transparent; text-align: left; font-weight: normal;padding: 5px;; font-size: 13px"><span class="icon macro-placeholder-icon" style="background-color: ;line-height: 20px;"><img src="https://cwiki.apache.org/confluence/s/en_GB-1988229788/4109/76e0dbb30bc8580e459c201f3535d84f9283a9ac.1/_/plugins/servlet/confluence/placeholder/macro-icon?name=code" style="padding-right: 5px; vertical-align: text-bottom;" /> </span>Code Block</th>
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                                                                <td class="diff-macro-body" style="background-color: #fff;border: 1px solid #dddddd;padding: 10px;; font-size: 13px"> <pre style="font-size: 13px">
<span class="diff-html-removed" id="removed-diff-19" style="font-size: 100%; background-color: #ffe7e7; text-decoration: line-through;">
</span>location=&quot;blueprint:myblueprint.placeholder,classpath:myproperties.properties&quot;
</pre> </td>
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                                                        </tbody>
                                                    </table>
                                                    <p class="diff-context-placeholder" style="font-size: 13px">...</p>
                                                    <p class="diff-block-context" style="font-size: 13px">The stuff.cfg file is just a plain properties file with the property placeholders such as:</p>
                                                    <table class="diff-macro diff-block-target" style="background-color: #f0f0f0;border: 1px solid #dddddd;margin: 10px 1px;padding: 0 2px 2px;width: 100%;">
                                                        <thead>
                                                            <tr>
                                                                <th class="diff-macro-title" style="background-color: transparent; text-align: left; font-weight: normal;padding: 5px;; font-size: 13px"><span class="icon macro-placeholder-icon" style="background-color: ;line-height: 20px;"><img src="https://cwiki.apache.org/confluence/s/en_GB-1988229788/4109/76e0dbb30bc8580e459c201f3535d84f9283a9ac.1/_/plugins/servlet/confluence/placeholder/macro-icon?name=code" style="padding-right: 5px; vertical-align: text-bottom;" /> </span>Code Block</th>
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                                                        </thead>
                                                        <tbody>
                                                            <tr>
                                                                <td class="diff-macro-body" style="background-color: #fff;border: 1px solid #dddddd;padding: 10px;; font-size: 13px"> <pre style="font-size: 13px">
<span class="diff-html-removed" id="removed-diff-20" style="font-size: 100%; background-color: #ffe7e7; text-decoration: line-through;">
</span>## this is a comment
greeting=Bye
</pre> </td>
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                                                        </tbody>
                                                    </table>
                                                    <p class="diff-context-placeholder" style="font-size: 13px">...</p>
                                                    <p class="diff-block-context" style="font-size: 13px">And the <code style="font-size: 13px">etc/stuff.cfg</code> configuration file contains</p>
                                                    <table class="diff-macro diff-block-target" style="background-color: #f0f0f0;border: 1px solid #dddddd;margin: 10px 1px;padding: 0 2px 2px;width: 100%;">
                                                        <thead>
                                                            <tr>
                                                                <th class="diff-macro-title" style="background-color: transparent; text-align: left; font-weight: normal;padding: 5px;; font-size: 13px"><span class="icon macro-placeholder-icon" style="background-color: ;line-height: 20px;"><img src="https://cwiki.apache.org/confluence/s/en_GB-1988229788/4109/76e0dbb30bc8580e459c201f3535d84f9283a9ac.1/_/plugins/servlet/confluence/placeholder/macro-icon?name=code" style="padding-right: 5px; vertical-align: text-bottom;" /> </span>Code Block</th>
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                                                            <tr>
                                                                <td class="diff-macro-body" style="background-color: #fff;border: 1px solid #dddddd;padding: 10px;; font-size: 13px"> <pre style="font-size: 13px">
<span class="diff-html-removed" id="removed-diff-21" style="font-size: 100%; background-color: #ffe7e7; text-decoration: line-through;">
</span>greeting=Bye
echo=Yay
destination=mock:result
</pre> </td>
                                                            </tr>
                                                        </tbody>
                                                    </table>
                                                    <p class="diff-context-placeholder" style="font-size: 13px">...</p>
                                                    <p class="diff-block-context" style="font-size: 13px">Take notice when using Spring bridging placeholder then the spring ${ } syntax clashes with the <a class="confluence-link unresolved" href="#" style="color: #326ca6; text-decoration: none">Simple</a> in Camel, and therefore take care. For example:</p>
                                                    <table class="diff-macro diff-block-target" style="background-color: #f0f0f0;border: 1px solid #dddddd;margin: 10px 1px;padding: 0 2px 2px;width: 100%;">
                                                        <thead>
                                                            <tr>
                                                                <th class="diff-macro-title" style="background-color: transparent; text-align: left; font-weight: normal;padding: 5px;; font-size: 13px"><span class="icon macro-placeholder-icon" style="background-color: ;line-height: 20px;"><img src="https://cwiki.apache.org/confluence/s/en_GB-1988229788/4109/76e0dbb30bc8580e459c201f3535d84f9283a9ac.1/_/plugins/servlet/confluence/placeholder/macro-icon?name=code" style="padding-right: 5px; vertical-align: text-bottom;" /> </span>Code Block</th>
                                                            </tr>
                                                        </thead>
                                                        <tbody>
                                                            <tr>
                                                                <td class="diff-macro-body" style="background-color: #fff;border: 1px solid #dddddd;padding: 10px;; font-size: 13px"> <pre style="font-size: 13px">
<span class="diff-html-removed" id="removed-diff-22" style="font-size: 100%; background-color: #ffe7e7; text-decoration: line-through;">
</span>&lt;setHeader headerName=&quot;Exchange.FILE_NAME&quot;&gt;
  &lt;simple&gt;{{file.rootdir}}/${in.header.CamelFileName}&lt;/simple&gt;
&lt;/setHeader&gt;
</pre> </td>
                                                            </tr>
                                                        </tbody>
                                                    </table>
                                                    <p class="diff-block-context" style="font-size: 13px">clashes with Spring property placeholders, and you should use $simple{ } to indicate using the <a class="confluence-link unresolved" href="#" style="color: #326ca6; text-decoration: none">Simple</a> language in Camel.</p>
                                                    <table class="diff-macro diff-block-target" style="background-color: #f0f0f0;border: 1px solid #dddddd;margin: 10px 1px;padding: 0 2px 2px;width: 100%;">
                                                        <thead>
                                                            <tr>
                                                                <th class="diff-macro-title" style="background-color: transparent; text-align: left; font-weight: normal;padding: 5px;; font-size: 13px"><span class="icon macro-placeholder-icon" style="background-color: ;line-height: 20px;"><img src="https://cwiki.apache.org/confluence/s/en_GB-1988229788/4109/76e0dbb30bc8580e459c201f3535d84f9283a9ac.1/_/plugins/servlet/confluence/placeholder/macro-icon?name=code" style="padding-right: 5px; vertical-align: text-bottom;" /> </span>Code Block</th>
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                                                                <td class="diff-macro-body" style="background-color: #fff;border: 1px solid #dddddd;padding: 10px;; font-size: 13px"> <pre style="font-size: 13px">
<span class="diff-html-removed" id="removed-diff-23" style="font-size: 100%; background-color: #ffe7e7; text-decoration: line-through;">
</span>&lt;setHeader headerName=&quot;Exchange.FILE_NAME&quot;&gt;
  &lt;simple&gt;{{file.rootdir}}/$simple{in.header.CamelFileName}&lt;/simple&gt;
&lt;/setHeader&gt;
</pre> </td>
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                                                    </table>
                                                    <p class="diff-context-placeholder" style="font-size: 13px">...</p>
                                                    <p class="diff-block-context" style="font-size: 13px">Camel allows to inject property placeholders in POJOs using the @PropertyInject annotation which can be set on fields and setter methods.<br /> For example you can use that with <code style="font-size: 13px">RouteBuilder</code> classes, such as shown below:</p>
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                                                                <th class="diff-macro-title" style="background-color: transparent; text-align: left; font-weight: normal;padding: 5px;; font-size: 13px"><span class="icon macro-placeholder-icon" style="background-color: ;line-height: 20px;"><img src="https://cwiki.apache.org/confluence/s/en_GB-1988229788/4109/76e0dbb30bc8580e459c201f3535d84f9283a9ac.1/_/plugins/servlet/confluence/placeholder/macro-icon?name=code" style="padding-right: 5px; vertical-align: text-bottom;" /> </span>Code Block</th>
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                                                                <td class="diff-macro-properties" style="background-color: #fafafa; padding: 0 0 0 5px; font-size: 12px; text-align: left;padding: 0; border: 1px solid #dddddd;; font-size: 13px">
                                                                    <table>
                                                                        <tbody>
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                                                                                <td style="background-color: #fafafa; padding: 0 0 0 5px; font-size: 12px; text-align: left;; font-size: 13px"></td>
                                                                                <td style="background-color: #fafafa; padding: 0 0 0 5px; font-size: 12px; text-align: left;; font-size: 13px">java</td>
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                                                                    </table> </td>
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                                                                <td class="diff-macro-body" style="background-color: #fff;border: 1px solid #dddddd;padding: 10px;; font-size: 13px"> <pre style="font-size: 13px">
<span class="diff-html-removed" id="removed-diff-24" style="font-size: 100%; background-color: #ffe7e7; text-decoration: line-through;">
</span>public class MyRouteBuilder extends RouteBuilder {

    @PropertyInject(&quot;hello&quot;)
    private String greeting;

    @Override
    public void configure() throws Exception {
        from(&quot;direct:start&quot;)
            .transform().constant(greeting)
            .to(&quot;{{result}}&quot;);
    }

}
</pre> </td>
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                                                        </tbody>
                                                    </table>
                                                    <p class="diff-context-placeholder" style="font-size: 13px">...</p>
                                                    <p class="diff-block-context" style="font-size: 13px">You can also use multiple placeholders and text in the key, for example we can do:</p>
                                                    <table class="diff-macro diff-block-target" style="background-color: #f0f0f0;border: 1px solid #dddddd;margin: 10px 1px;padding: 0 2px 2px;width: 100%;">
                                                        <thead>
                                                            <tr>
                                                                <th class="diff-macro-title" style="background-color: transparent; text-align: left; font-weight: normal;padding: 5px;; font-size: 13px"><span class="icon macro-placeholder-icon" style="background-color: ;line-height: 20px;"><img src="https://cwiki.apache.org/confluence/s/en_GB-1988229788/4109/76e0dbb30bc8580e459c201f3535d84f9283a9ac.1/_/plugins/servlet/confluence/placeholder/macro-icon?name=code" style="padding-right: 5px; vertical-align: text-bottom;" /> </span>Code Block</th>
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                                                                <td class="diff-macro-body" style="background-color: #fff;border: 1px solid #dddddd;padding: 10px;; font-size: 13px"> <pre style="font-size: 13px">
<span class="diff-html-removed" id="removed-diff-25" style="font-size: 100%; background-color: #ffe7e7; text-decoration: line-through;"> </span>@PropertyInject(&quot;Hello {{name}} how are you?&quot;)
    private String greeting;
</pre> </td>
                                                            </tr>
                                                        </tbody>
                                                    </table>
                                                    <p class="diff-context-placeholder" style="font-size: 13px">...</p>
                                                    <p class="diff-block-context" style="font-size: 13px">You can also add a default value if the key does not exists, such as:</p>
                                                    <table class="diff-macro diff-block-target" style="background-color: #f0f0f0;border: 1px solid #dddddd;margin: 10px 1px;padding: 0 2px 2px;width: 100%;">
                                                        <thead>
                                                            <tr>
                                                                <th class="diff-macro-title" style="background-color: transparent; text-align: left; font-weight: normal;padding: 5px;; font-size: 13px"><span class="icon macro-placeholder-icon" style="background-color: ;line-height: 20px;"><img src="https://cwiki.apache.org/confluence/s/en_GB-1988229788/4109/76e0dbb30bc8580e459c201f3535d84f9283a9ac.1/_/plugins/servlet/confluence/placeholder/macro-icon?name=code" style="padding-right: 5px; vertical-align: text-bottom;" /> </span>Code Block</th>
                                                            </tr>
                                                        </thead>
                                                        <tbody>
                                                            <tr>
                                                                <td class="diff-macro-body" style="background-color: #fff;border: 1px solid #dddddd;padding: 10px;; font-size: 13px"> <pre style="font-size: 13px">
<span class="diff-html-removed" id="removed-diff-26" style="font-size: 100%; background-color: #ffe7e7; text-decoration: line-through;"> </span>@PropertyInject(value = &quot;myTimeout&quot;, defaultValue = &quot;5000&quot;)
    private int timeout;
</pre> </td>
                                                            </tr>
                                                        </tbody>
                                                    </table>
                                                    <p class="diff-context-placeholder" style="font-size: 13px">...</p>
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