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Date: Wed, 9 Apr 2008 06:57:32 -0700 (PDT)
From: "Hiram Chirino (JIRA)" <jira@apache.org>
To: dev@activemq.apache.org
Subject: [jira] Resolved: (AMQ-1457) Can't set properties on
 ActiveMQBytesMessage after a reset()
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     [ https://issues.apache.org/activemq/browse/AMQ-1457?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Hiram Chirino resolved AMQ-1457.
--------------------------------

    Resolution: Won't Fix

You could always just write your data to a ByteArrayOutputStream then get the resulting byte[] to find out the length and then write that to message.

I looks to me like this patch would violate the read-only bit of the spec so I'm not leaning towards applying it.

> Can't set properties on ActiveMQBytesMessage after a reset()
> ------------------------------------------------------------
>
>                 Key: AMQ-1457
>                 URL: https://issues.apache.org/activemq/browse/AMQ-1457
>             Project: ActiveMQ
>          Issue Type: Improvement
>    Affects Versions: 4.1.1, 5.0.0
>            Reporter: Nic Grounds
>         Attachments: propertyAfterReset.patch
>
>
> Once the reset() method has been called on an ActiveMQBytesMessage object, properties can no longer be set.  The use case is that I need to set a property to represent the message length (number of bytes) but I can't determine that (using the getBodyLength() method) until after a call to reset().
> A very crude patch is included which prevents the [unnecessary?] assumption that the ActiveMQBytesMessage may be uninitialized when setting an object property.
> Note: the documentation for a JMS BytesMessage API documentation states that the reset() method puts the BytesMessage into read-only mode but whether this applies to the body only or to the body and properties is unclear.
> I marked this issue as an improvement because I'm not convinced whether it is a bug or whether there is a another, better way to accomplish what I'm trying to do.

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