/*
* Copyright 2015 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.cloud.stream.module.retry;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.data.redis.RedisSystemException;
import org.springframework.data.redis.core.RedisCallback;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.retry.RecoveryCallback;
import org.springframework.retry.RetryCallback;
import org.springframework.retry.RetryContext;
import org.springframework.retry.RetryOperations;
/**
* Adds Retry functionality to RedisTemplate
*
* @author Mark Pollack
*/
public class RedisRetryTemplate<K, V> extends RedisTemplate<K, V> {
private static final Logger logger = LoggerFactory.getLogger(RedisRetryTemplate.class);
private volatile RetryOperations retryOperations;
private volatile RecoveryCallback<?> recoveryCallback = new LoggingRecoveryCallback();
public RetryOperations RetryOperations() {
return retryOperations;
}
public void setRetryOperations(RetryOperations retryOperations) {
this.retryOperations = retryOperations;
}
public RecoveryCallback<?> getRecoveryCallback() {
return recoveryCallback;
}
public void setRecoveryCallback(RecoveryCallback<?> recoveryCallback) {
this.recoveryCallback = recoveryCallback;
}
@Override
@SuppressWarnings("unchecked")
public <T> T execute(final RedisCallback<T> action, final boolean exposeConnection, final boolean pipeline) {
if (this.retryOperations != null) {
try {
return this.retryOperations.execute(new RetryCallback<T, Exception>() {
@Override
public T doWithRetry(RetryContext context) throws Exception {
if (context.getRetryCount() > 0) {
logger.warn("Retry of Redis Operation. Retry Count = " + context.getRetryCount());
}
return RedisRetryTemplate.super.execute(action, exposeConnection, pipeline);
}
}, (RecoveryCallback<T>) this.recoveryCallback);
}
catch (Exception e) {
if (e instanceof RuntimeException) {
throw (RuntimeException) e;
}
throw new RedisSystemException("Unknown checked exception translated", e);
}
}
else {
return super.execute(action, exposeConnection, pipeline);
}
}
}