org.apache.batchee.container.proxy.BatchProxyInvocationHandler Maven / Gradle / Ivy
/*
* 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.
*/
package org.apache.batchee.container.proxy;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.Arrays;
import org.apache.batchee.container.exception.BatchContainerRuntimeException;
/**
* Proxy handler for all our Batch parts like ItemReader,
* ItemWriter, etc.
* Most batch part methods store away the exception in the StepContext. A few methods
* need to be excluded from that rule in order to provide skip/retry logic.
*
*/
public class BatchProxyInvocationHandler implements InvocationHandler {
private final InjectionReferences injectionRefs;
private final Object delegate;
private final String[] nonExceptionHandlingMethods;
/**
*
* @param delegate the internal delegate which does the real job
* @param injectionRefs used to store any Exceptions and for CDI support
* @param nonExceptionHandlingMethods array of methods which should not cause the Exceptions to be stored in the StepContext
*/
public BatchProxyInvocationHandler(Object delegate, InjectionReferences injectionRefs, String... nonExceptionHandlingMethods) {
this.delegate = delegate;
this.injectionRefs = injectionRefs;
this.nonExceptionHandlingMethods = nonExceptionHandlingMethods;
}
@Override
public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
InjectionReferences oldInjectionRefs = ProxyFactory.setInjectionReferences(this.injectionRefs);
try {
return method.invoke(delegate, args);
} catch (Throwable e) {
if (e instanceof InvocationTargetException) {
e = e.getCause();
}
if (nonExceptionHandlingMethods == null || Arrays.binarySearch(nonExceptionHandlingMethods, method.getName()) < 0) {
if (e instanceof Exception) {
if (injectionRefs.getStepContext() != null) {
injectionRefs.getStepContext().setException((Exception) e);
}
throw new BatchContainerRuntimeException(e);
}
}
throw e;
} finally {
ProxyFactory.setInjectionReferences(oldInjectionRefs);
}
}
}
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