/*
* Copyright 2002-2017 the original author or authors.
*
* Licensed 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.springframework.integration.channel;
import org.springframework.integration.context.IntegrationContextUtils;
import org.springframework.integration.support.ErrorMessagePublisher;
import org.springframework.integration.support.ErrorMessageStrategy;
import org.springframework.integration.support.MessagingExceptionWrapper;
import org.springframework.messaging.Message;
import org.springframework.messaging.MessageChannel;
import org.springframework.messaging.MessagingException;
import org.springframework.messaging.core.DestinationResolver;
import org.springframework.messaging.support.ErrorMessage;
import org.springframework.util.Assert;
import org.springframework.util.ErrorHandler;
/**
* {@link ErrorHandler} implementation that sends an {@link ErrorMessage} to a
* {@link MessageChannel}.
*
* @author Mark Fisher
* @author Iwein Fuld
* @author Oleg Zhurakousky
* @author Gary Russell
* @author Artem Bilan
*/
public class MessagePublishingErrorHandler extends ErrorMessagePublisher implements ErrorHandler {
private static final int DEFAULT_SEND_TIMEOUT = 1000;
private static final ErrorMessageStrategy DEFAULT_ERROR_MESSAGE_STRATEGY = (t, a) -> {
if (t instanceof MessagingExceptionWrapper) {
return new ErrorMessage(t.getCause(), ((MessagingExceptionWrapper) t).getFailedMessage());
}
else {
return new ErrorMessage(t);
}
};
public MessagePublishingErrorHandler() {
setErrorMessageStrategy(DEFAULT_ERROR_MESSAGE_STRATEGY);
setSendTimeout(DEFAULT_SEND_TIMEOUT);
}
public MessagePublishingErrorHandler(DestinationResolver<MessageChannel> channelResolver) {
this();
setChannelResolver(channelResolver);
}
public void setDefaultErrorChannel(MessageChannel defaultErrorChannel) {
setChannel(defaultErrorChannel);
}
/**
* Return the default error channel for this error handler.
* @return the error channel.
* @since 4.3
*/
public MessageChannel getDefaultErrorChannel() {
return getChannel();
}
/**
* Specify the bean name of default error channel for this error handler.
* @param defaultErrorChannelName the bean name of the error channel
* @since 4.3.3
*/
public void setDefaultErrorChannelName(String defaultErrorChannelName) {
setChannelName(defaultErrorChannelName);
}
@Override
public final void handleError(Throwable t) {
MessageChannel errorChannel = resolveErrorChannel(t);
boolean sent = false;
if (errorChannel != null) {
try {
getMessagingTemplate().send(errorChannel, getErrorMessageStrategy().buildErrorMessage(t, null));
sent = true;
}
catch (Throwable errorDeliveryError) { //NOSONAR
// message will be logged only
if (this.logger.isWarnEnabled()) {
this.logger.warn("Error message was not delivered.", errorDeliveryError);
}
if (errorDeliveryError instanceof Error) {
throw ((Error) errorDeliveryError);
}
}
}
if (!sent && this.logger.isErrorEnabled()) {
Message<?> failedMessage = (t instanceof MessagingException) ?
((MessagingException) t).getFailedMessage() : null;
if (failedMessage != null) {
this.logger.error("failure occurred in messaging task with message: " + failedMessage, t);
}
else {
this.logger.error("failure occurred in messaging task", t);
}
}
}
private MessageChannel resolveErrorChannel(Throwable t) {
Throwable actualThrowable = t;
if (t instanceof MessagingExceptionWrapper) {
actualThrowable = t.getCause();
}
Message<?> failedMessage = (actualThrowable instanceof MessagingException) ?
((MessagingException) actualThrowable).getFailedMessage() : null;
if (getDefaultErrorChannel() == null && getChannelResolver() != null) {
setChannel(getChannelResolver().resolveDestination(
IntegrationContextUtils.ERROR_CHANNEL_BEAN_NAME));
}
if (failedMessage == null || failedMessage.getHeaders().getErrorChannel() == null) {
return getDefaultErrorChannel();
}
Object errorChannelHeader = failedMessage.getHeaders().getErrorChannel();
if (errorChannelHeader instanceof MessageChannel) {
return (MessageChannel) errorChannelHeader;
}
Assert.isInstanceOf(String.class, errorChannelHeader,
"Unsupported error channel header type. Expected MessageChannel or String, but actual type is [" +
errorChannelHeader.getClass() + "]");
return getChannelResolver().resolveDestination((String) errorChannelHeader);
}
}