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| |
| <document> |
| <properties> |
| <title>Apache Synapse - Sample 361</title> |
| </properties> |
| <body> |
| <section name="Sample 361: Introduction to DBReport Mediator"> |
| <div class="xmlConf"><definitions xmlns="http://ws.apache.org/ns/synapse"> |
| |
| <sequence name="main"> |
| <in> |
| <send> |
| <endpoint> |
| <address uri="http://localhost:9000/services/SimpleStockQuoteService"/> |
| </endpoint> |
| </send> |
| </in> |
| |
| <out> |
| <log level="custom"> |
| <property name="text" value="** Reporting to the Database **"/> |
| </log> |
| <dbreport> |
| <connection> |
| <pool> |
| <driver>org.apache.derby.jdbc.ClientDriver</driver> |
| <url>jdbc:derby://localhost:1527/synapsedb;create=false</url> |
| <user>synapse</user> |
| <password>synapse</password> |
| </pool> |
| </connection> |
| <statement> |
| <sql>update company set price=? where name =?</sql> |
| <parameter xmlns:m1="http://services.samples/xsd" |
| xmlns:m0="http://services.samples" |
| expression="//m0:return/m1:last/child::text()" type="DOUBLE"/> |
| <parameter xmlns:m1="http://services.samples/xsd" |
| xmlns:m0="http://services.samples" |
| expression="//m0:return/m1:symbol/child::text()" type="VARCHAR"/> |
| </statement> |
| </dbreport> |
| <send/> |
| </out> |
| </sequence> |
| |
| </definitions></div> |
| <subsection name="Objective"> |
| <p> |
| <a href="sample360.html">Sample 360</a> shows how to perform database lookups |
| in Synapse. This sample illustrates how to write to a given database from |
| Synapse using the dbreport mediator. |
| </p> |
| </subsection> |
| <subsection name="Pre-requisites"> |
| <p> |
| <ul> |
| <li> |
| Setup a Derby database as described in the <a href="setup/db.html">database setup guide</a> |
| </li> |
| <li> |
| Deploy the SimpleStockQuoteService in the sample Axis2 server and start Axis2 |
| </li> |
| <li> |
| Start Synapse using the configuration numbered 361 (repository/conf/sample/synapse_sample_361.xml) |
| <div class="command"> |
| Unix/Linux: sh synapse.sh -sample 361<br/> |
| Windows: synapse.bat -sample 361 |
| </div> |
| </li> |
| </ul> |
| </p> |
| </subsection> |
| <subsection name="Executing the Client"> |
| <p> |
| This sample demonstrates how to perform simple database write operations in |
| Synapse. The dbreport mediator writes (i.e. inserts one row) to a table using the |
| details available in messages. It works the same way as the dblookup mediator. |
| In this sample, dbreport mediator is used for updating the stock price of the |
| company using the last quote value which is calculated by evaluating an XPath |
| against the response message. After running this sample, user can check the |
| company table using the Derby client tool. It will show the value inserted by the |
| dbreport mediator. |
| </p> |
| <p> |
| To try this out run the sample client as follows. |
| </p> |
| <div class="command">ant stockquote -Daddurl=http://localhost:9000/services/SimpleStockQuoteService -Dtrpurl=http://localhost:8280/ -Dsymbol=IBM</div> |
| <p> |
| Now execute the following SQL query against the Derby database using the Derby |
| client tool. |
| </p> |
| <div class="command">select price from company where name='IBM';</div> |
| <p> |
| This operation will return the stock quote value returned earlier by Axis2. You |
| can compare the output of the sample Axis2 client with the output of the Derby |
| client tool for confirmation. |
| </p> |
| </subsection> |
| </section> |
| <p><a href="../samples.html">Back to Catalog</a></p> |
| </body> |
| </document> |
