| <?xml version="1.0" encoding="ISO-8859-1" ?> |
| <!-- |
| ~ Licensed to the Apache Software Foundation (ASF) under one |
| ~ or more contributor license agreements. See the NOTICE file |
| ~ distributed with this work for additional information |
| ~ regarding copyright ownership. The ASF licenses this file |
| ~ to you under the Apache License, Version 2.0 (the |
| ~ "License"); you may not use this file except in compliance |
| ~ with the License. You may obtain a copy of the License at |
| ~ |
| ~ http://www.apache.org/licenses/LICENSE-2.0 |
| ~ |
| ~ Unless required by applicable law or agreed to in writing, |
| ~ software distributed under the License is distributed on an |
| ~ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| ~ KIND, either express or implied. See the License for the |
| ~ specific language governing permissions and limitations |
| ~ under the License. |
| --> |
| |
| <document> |
| <properties> |
| <title>Apache Synapse - Sample 362</title> |
| </properties> |
| <body> |
| <section name="Sample 362: Perform Database Lookups and Updates in the Same Mediation Sequence"> |
| <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> |
| <log level="custom"> |
| <property name="text" value="** Looking up from the Database **"/> |
| </log> |
| <dblookup> |
| <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>select * from company where name =?</sql> |
| <parameter xmlns:m1="http://services.samples/xsd" |
| xmlns:m0="http://services.samples" |
| expression="//m0:return/m1:symbol/child::text()" type="VARCHAR"/> |
| <result name="stock_price" column="price"/> |
| </statement> |
| </dblookup> |
| <log level="custom"> |
| <property name="text" |
| expression="fn:concat('Stock price - ',get-property('stock_price'))"/> |
| </log> |
| <send/> |
| </out> |
| </sequence> |
| |
| </definitions></div> |
| <subsection name="Objective"> |
| <p> |
| <a href="sample360.html">Sample 360</a> and <a href="sample361.html">sample 361</a> |
| shows how to use the dblookup mediator and dbreport mediator separately. This sample |
| combines them in a single mediation sequence to perform both database lookup and |
| update operations. |
| </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 362 (repository/conf/sample/synapse_sample_362.xml) |
| <div class="command"> |
| Unix/Linux: sh synapse.sh -sample 362<br/> |
| Windows: synapse.bat -sample 362 |
| </div> |
| </li> |
| </ul> |
| </p> |
| </subsection> |
| <subsection name="Executing the Client"> |
| <p> |
| In this sample, the dbreport mediator works the same way as in |
| <a href="sample361.html">sample 361</a>. It updates the price for the given company |
| using the response messages content. Then the dblookup mediator reads the last |
| updated value from the company database and logs it to the console. |
| </p> |
| <p> |
| 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> |
| Synapse will update the database using the stock quote value available in the |
| response sent by Axis2. Then the same value will be retrieved from the database |
| and logged as follows. |
| </p> |
| <div class="consoleOutput">INFO LogMediator text = ** Reporting to the Database ** |
| ... |
| INFO LogMediator text = ** Looking up from the Database ** |
| ... |
| INFO LogMediator text = Stock price - 153.47886496064808</div> |
| </subsection> |
| </section> |
| <p><a href="../samples.html">Back to Catalog</a></p> |
| </body> |
| </document> |
