php-doc-en/reference/sam/functions/SAM-Connection-send.xml
Dave Renshaw 66b884c24c *** empty log message ***
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2006-12-18 16:24:31 +00:00

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<?xml version="1.0" encoding="iso-8859-1"?>
<!-- $Revision: 1.4 $ -->
<refentry id='function.SAM-Connection-send'>
<refnamediv>
<refname>SAMConnection::send()</refname>
<refpurpose>
Send a message to a queue or publish an item to a topic.
</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<para>
The "send" method is used to send a message to a specific queue or to publish to a specific topic. The method returns a correlation id that can be used as a selector to identify reply or response messages when these are requested.
</para>
<classsynopsis>
<ooclass><classname>SAMConnection</classname></ooclass>
<methodsynopsis>
<type>string</type><methodname>send</methodname>
<methodparam><type>string</type><parameter>target</parameter></methodparam>
<methodparam><type>SAMMessage</type><parameter>msg</parameter></methodparam>
<methodparam choice='opt'><type>array</type><parameter>properties</parameter></methodparam>
</methodsynopsis>
</classsynopsis>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<para>
<variablelist>
<varlistentry>
<term><parameter>target</parameter></term>
<listitem>
<para>
If sending a message, the identity of the queue (queue://queuename) or if publishing to a topic the identity of the topic (topic://topicname) to which the message is to be delivered.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>msg</parameter></term>
<listitem>
<para>
The message to be sent or published.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>properties</parameter></term>
<listitem>
<para>
An optional associative array of properties describing other parameters to control the receive operation.
<informaltable>
<tgroup cols="2">
<thead>
<row>
<entry>Property name</entry>
<entry>Possible values</entry>
</row>
</thead>
<tbody>
<row>
<entry>SAM_DELIVERYMODE</entry>
<entry>
Indicates whether the messaging server should enusre delivery or whether it is acceptable for messages
to be lost in the case of system failures. The value of this property may be set to either SAM_PERSISTENT, to
indicate that message loss is not acceptable, or SAM_NON_PERSISTENT, if message loss is acceptable.
The resulting behaviour of the send will vary depending on the capabilities of the messaging server the
PHP script is currently connected to. If the server does not support persistent messages and SAM_PERSISTENT
is specified the send request will fail with an error indication showing the capability is not available.
</entry>
</row>
<row>
<entry>SAM_PRIORITY</entry>
<entry>
A numeric value between 0 and 9 indicating the desired message delivery priority. A priority value of 0
indicates the lowest priority while 9 indicates highest priority. If no priority is specified
a default will be assigned which is dependent on the messaging server being used.
</entry>
</row>
<row>
<entry>SAM_CORRELID</entry>
<entry>
A string to be assigned as a correlation id for this message. If no value is given the messaging server
may assign a value automatically.
</entry>
</row>
<row>
<entry>SAM_TIMETOLIVE</entry>
<entry>
A time in milliseconds indicating how long the messaging server should retain the message on a queue before
discarding it. The default value is 0 indicating the message should be retained indefinitely.
</entry>
</row>
<row>
<entry>SAM_WMQ_TARGET_CLIENT</entry>
<entry>
This property is only valid when using WebSphere MQ and indicates whether or not an RFH2 header should be
included with the message. This option may be set to either 'jms' or 'mq'. The default is 'jms' which means
that an RFH2 header is included. If the value 'mq' is specified then no RFH2 is included with the message.
</entry>
</row>
</tbody>
</tgroup>
</informaltable>
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
A correlation id string that can be used in a subsequent receive call as a selector to obtain any reply or response that has been requested or &false; if an error occurred.
Note: a correlation id will only be returned for a successful send to a queue destination (queue://xxxx) in which case it
will reflect the message identitiy of the message on the queue. In the case of a send being used to publish data to a
topic the return value will be &true; as no correlation id is availabe for return.
</para>
</refsect1>
<refsect1 role="examples">
&reftitle.examples;
<para>
<example>
<title>Send a message to a queue</title>
<programlisting role="php">
<![CDATA[
<?php
$msg = new SAMMessage('This is a simple text message');
$correlId = $conn->send('queue://send/test', $msg);
if (!$correlId) {
// The send failed!
echo "Send failed ($conn->errno) $conn->error";
}
?>
]]>
</programlisting>
</example>
</para>
<para>
<example>
<title>Publish a message to a topic</title>
<programlisting role="php">
<![CDATA[
<?php
$msg = new SAMMessage('This is a simple text item');
if (!$conn->send('topic://test', $msg)) {
// The Send failed!
echo "Send failed ($conn->errno) $conn->error";
}
?>
]]>
</programlisting>
</example>
<example>
<title>Send a request and receive a response</title>
<programlisting role="php">
<![CDATA[
<?php
$msg = new SAMMessage('This is a simple text message');
$msg->header->SAM_REPLY_TO = 'queue://receive/test';
$correlid = $conn->send('queue://send/test', $msg);
if (!$correlid) {
// The Send failed!
echo "Send failed ($conn->errno) $conn->error";
} else {
$resp = $conn->receive('queue://receive/test', array(SAM_CORRELID => $correlid));
}
?>
]]>
</programlisting>
</example>
</para>
</refsect1>
</refentry>
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