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From aleds...@apache.org
Subject [12/27] incubator-brooklyn git commit: Adds support for ${attribute['attribute.name']} sensor access in freemarker templates
Date Fri, 29 May 2015 17:22:05 GMT
Adds support for ${attribute['attribute.name']} sensor access in freemarker templates


Project: http://git-wip-us.apache.org/repos/asf/incubator-brooklyn/repo
Commit: http://git-wip-us.apache.org/repos/asf/incubator-brooklyn/commit/176eed3e
Tree: http://git-wip-us.apache.org/repos/asf/incubator-brooklyn/tree/176eed3e
Diff: http://git-wip-us.apache.org/repos/asf/incubator-brooklyn/diff/176eed3e

Branch: refs/heads/master
Commit: 176eed3e6e4184b74577f2fd6e29f539ad2650ad
Parents: c9bde14
Author: Martin Harris <github@nakomis.com>
Authored: Wed Apr 15 16:13:53 2015 +0100
Committer: Richard Downer <richard@apache.org>
Committed: Thu May 28 17:27:34 2015 +0100

----------------------------------------------------------------------
 .../brooklyn/util/text/TemplateProcessor.java   | 41 ++++++++++++++++++++
 1 file changed, 41 insertions(+)
----------------------------------------------------------------------


http://git-wip-us.apache.org/repos/asf/incubator-brooklyn/blob/176eed3e/core/src/main/java/brooklyn/util/text/TemplateProcessor.java
----------------------------------------------------------------------
diff --git a/core/src/main/java/brooklyn/util/text/TemplateProcessor.java b/core/src/main/java/brooklyn/util/text/TemplateProcessor.java
index 9f30c88..307b92a 100644
--- a/core/src/main/java/brooklyn/util/text/TemplateProcessor.java
+++ b/core/src/main/java/brooklyn/util/text/TemplateProcessor.java
@@ -30,8 +30,12 @@ import org.slf4j.LoggerFactory;
 
 import brooklyn.entity.Entity;
 import brooklyn.entity.basic.ConfigKeys;
+import brooklyn.entity.basic.Entities;
 import brooklyn.entity.basic.EntityInternal;
 import brooklyn.entity.drivers.EntityDriver;
+import brooklyn.event.AttributeSensor;
+import brooklyn.event.basic.DependentConfiguration;
+import brooklyn.event.basic.Sensors;
 import brooklyn.location.Location;
 import brooklyn.management.ManagementContext;
 import brooklyn.management.internal.ManagementContextInternal;
@@ -225,6 +229,40 @@ public class TemplateProcessor {
         }
     }
 
+    protected final static class EntityAttributeTemplateModel implements TemplateHashModel
{
+        protected final EntityInternal entity;
+
+        protected EntityAttributeTemplateModel(EntityInternal entity) {
+            this.entity = entity;
+        }
+
+        @Override
+        public boolean isEmpty() throws TemplateModelException {
+            return false;
+        }
+
+        @Override
+        public TemplateModel get(String key) throws TemplateModelException {
+            Object result;
+            try {
+                result = Entities.submit(entity, DependentConfiguration.attributeWhenReady(entity,
+                        Sensors.builder(Object.class, key).persistence(AttributeSensor.SensorPersistenceMode.NONE).build())).get();
+            } catch (Exception e) {
+                throw Exceptions.propagate(e);
+            }
+            if (result == null) {
+                return null;
+            } else {
+                return wrapAsTemplateModel(result);
+            }
+        }
+
+        @Override
+        public String toString() {
+            return getClass().getName()+"["+entity+"]";
+        }
+    }
+
     /**
      * Provides access to config on an entity or management context, using
      * <code>${config['entity.config.key']}</code> or <code>${mgmt['brooklyn.properties.key']}</code>
notation,
@@ -287,6 +325,9 @@ public class TemplateProcessor {
                 if (entity!=null)
                     return wrapAsTemplateModel( Iterables.getOnlyElement( entity.getLocations()
) );
             }
+            if ("attribute".equals(key)) {
+                return new EntityAttributeTemplateModel(entity);
+            }
             
             if (mgmt!=null) {
                 // TODO deprecated in 0.7.0, remove after next version


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