How to transfer data from mysql to oracle using camel - mysql

Question

I'm trying to copy data from Mysql (5.1.37) to an Oracle database (11) using Camel and Spring. The configuration looks like this:
<camelContext id="camelContext" xmlns="http://camel.apache.org/schema/spring">
<route>
<from uri="direct:start" />
<to uri="sql:select id, name, description from user?dataSourceRef=fromDataSource" />
<to uri="sql:insert into user (id, name, description) values (#, #, #)?dataSourceRef=toDataSource"/>
</route>
</camelContext>
I'm running it using the following code:
public void fetchUsers() throws Exception {
CamelContext context = (CamelContext) SpringUtil.getBean("camelContext");
ProducerTemplate template = context.createProducerTemplate();
context.start();
template.sendBody("direct:start", "test");
}
However, I'm getting an exception:
10:04:24,208 ERROR [main] DefaultErrorHandler - Failed delivery for (MessageId: ID-UNISTHDW177-55800-1338278663095-0-3 on ExchangeId: ID-UNISTHDW177-55800-1338278663095-0-2). Exhausted after delivery attempt: 1 caught: org.apache.camel.CamelExecutionException: Exception occurred during execution on the exchange: Exchange[Message: [{id=1, name=Carl, description=Developer}, {id=2, name=Lars, description=Developer}]]
org.apache.camel.CamelExecutionException: Exception occurred during execution on the exchange: Exchange[Message: [{id=1, name=Carl, description=Developer}, {id=2, name=Lars, description=Developer}]]
at org.apache.camel.util.ObjectHelper.wrapCamelExecutionException(ObjectHelper.java:1237)
at org.apache.camel.impl.DefaultExchange.setException(DefaultExchange.java:282)
at org.apache.camel.util.AsyncProcessorConverterHelper$ProcessorToAsyncProcessorBridge.process(AsyncProcessorConverterHelper.java:64)
at org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:73)
at org.apache.camel.processor.SendProcessor$2.doInAsyncProducer(SendProcessor.java:115)
at org.apache.camel.impl.ProducerCache.doInAsyncProducer(ProducerCache.java:285)
at org.apache.camel.processor.SendProcessor.process(SendProcessor.java:110)
at org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:73)
at org.apache.camel.processor.DelegateAsyncProcessor.processNext(DelegateAsyncProcessor.java:99)
at org.apache.camel.processor.DelegateAsyncProcessor.process(DelegateAsyncProcessor.java:90)
at org.apache.camel.management.InstrumentationProcessor.process(InstrumentationProcessor.java:71)
at org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:73)
at org.apache.camel.processor.DelegateAsyncProcessor.processNext(DelegateAsyncProcessor.java:99)
at org.apache.camel.processor.DelegateAsyncProcessor.process(DelegateAsyncProcessor.java:90)
at org.apache.camel.processor.interceptor.TraceInterceptor.process(TraceInterceptor.java:91)
at org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:73)
at org.apache.camel.processor.RedeliveryErrorHandler.processErrorHandler(RedeliveryErrorHandler.java:333)
at org.apache.camel.processor.RedeliveryErrorHandler.process(RedeliveryErrorHandler.java:223)
at org.apache.camel.processor.RouteContextProcessor.processNext(RouteContextProcessor.java:45)
at org.apache.camel.processor.DelegateAsyncProcessor.process(DelegateAsyncProcessor.java:90)
at org.apache.camel.processor.interceptor.DefaultChannel.process(DefaultChannel.java:304)
at org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:73)
at org.apache.camel.processor.Pipeline.process(Pipeline.java:117)
at org.apache.camel.processor.Pipeline.process(Pipeline.java:80)
at org.apache.camel.processor.RouteContextProcessor.processNext(RouteContextProcessor.java:45)
at org.apache.camel.processor.DelegateAsyncProcessor.process(DelegateAsyncProcessor.java:90)
at org.apache.camel.processor.UnitOfWorkProcessor.process(UnitOfWorkProcessor.java:122)
at org.apache.camel.processor.RouteInflightRepositoryProcessor.processNext(RouteInflightRepositoryProcessor.java:50)
at org.apache.camel.processor.DelegateAsyncProcessor.process(DelegateAsyncProcessor.java:90)
at org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:73)
at org.apache.camel.processor.DelegateAsyncProcessor.processNext(DelegateAsyncProcessor.java:99)
at org.apache.camel.processor.DelegateAsyncProcessor.process(DelegateAsyncProcessor.java:90)
at org.apache.camel.management.InstrumentationProcessor.process(InstrumentationProcessor.java:71)
at org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:73)
at org.apache.camel.component.direct.DirectProducer.process(DirectProducer.java:61)
at org.apache.camel.processor.UnitOfWorkProcessor.processAsync(UnitOfWorkProcessor.java:150)
at org.apache.camel.processor.UnitOfWorkProcessor.process(UnitOfWorkProcessor.java:117)
at org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:99)
at org.apache.camel.processor.DelegateAsyncProcessor.process(DelegateAsyncProcessor.java:86)
at org.apache.camel.processor.UnitOfWorkProducer.process(UnitOfWorkProducer.java:63)
at org.apache.camel.impl.ProducerCache$2.doInProducer(ProducerCache.java:352)
at org.apache.camel.impl.ProducerCache$2.doInProducer(ProducerCache.java:324)
at org.apache.camel.impl.ProducerCache.doInProducer(ProducerCache.java:223)
at org.apache.camel.impl.ProducerCache.sendExchange(ProducerCache.java:324)
at org.apache.camel.impl.ProducerCache.send(ProducerCache.java:169)
at org.apache.camel.impl.DefaultProducerTemplate.send(DefaultProducerTemplate.java:111)
at org.apache.camel.impl.DefaultProducerTemplate.sendBody(DefaultProducerTemplate.java:124)
at org.apache.camel.impl.DefaultProducerTemplate.sendBody(DefaultProducerTemplate.java:131)
at com.unibet.finance.reporting.camel.GordiumFetcherTest.camelShouldFetchGordiumAttributes(GordiumFetcherTest.java:22)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:28)
at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:31)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:76)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:193)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:52)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:191)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:42)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:184)
at org.junit.runners.ParentRunner.run(ParentRunner.java:236)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
Caused by: java.lang.AbstractMethodError
at org.apache.camel.component.sql.SqlProducer$1.doInPreparedStatement(SqlProducer.java:50)
at org.apache.camel.component.sql.SqlProducer$1.doInPreparedStatement(SqlProducer.java:48)
at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:586)
at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:614)
at org.apache.camel.component.sql.SqlProducer.process(SqlProducer.java:48)
at org.apache.camel.util.AsyncProcessorConverterHelper$ProcessorToAsyncProcessorBridge.process(AsyncProcessorConverterHelper.java:61)
... 70 more
What am I missing here?

Answer 1

This error occurs when your JDBC driver implements the older version of JDBC API then the one available in JRE you use to run your application (and which is required by Camel). You need JDBC API version >= 3 in this case.
The problem should be solved be updating your Oracle driver to the latest version (supporting your database).
You wrote in the comment that you had already tried to update the driver version (with no effect). Probably you got an older version of Oracle driver somewhere in the lib/ext directory in your application server. Probably you are using Maven to Fetch Oracle JDBC driver while another driver instance is provided by application server.
The is not the Camel problem, but JDBC driver and server classpath problem. Fix your driver classpath issue and Camel will do his job :) .