org.springframework.integration.config.ReleaseStrategyFactoryBean.java Source code

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Here is the source code for org.springframework.integration.config.ReleaseStrategyFactoryBean.java

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/*
 * Copyright 2002-2016 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.config;

import java.lang.reflect.Method;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import org.springframework.beans.factory.FactoryBean;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.integration.aggregator.MethodInvokingReleaseStrategy;
import org.springframework.integration.aggregator.ReleaseStrategy;
import org.springframework.integration.aggregator.SequenceSizeReleaseStrategy;
import org.springframework.integration.util.MessagingAnnotationUtils;
import org.springframework.util.StringUtils;

/**
 * Convenience factory for XML configuration of a {@link ReleaseStrategy}.
 * Encapsulates the knowledge of the default strategy and search algorithms for POJO and annotated methods.
 *
 * @author Dave Syer
 * @author Gary Russell
 * @author Artem Bilan
 *
 */
public class ReleaseStrategyFactoryBean implements FactoryBean<ReleaseStrategy>, InitializingBean {

    private static final Log logger = LogFactory.getLog(ReleaseStrategyFactoryBean.class);

    private Object target;

    private String methodName;

    private ReleaseStrategy strategy = new SequenceSizeReleaseStrategy();

    public ReleaseStrategyFactoryBean() {
    }

    public void setTarget(Object target) {
        this.target = target;
    }

    public void setMethodName(String methodName) {
        this.methodName = methodName;
    }

    @Override
    public void afterPropertiesSet() throws Exception {
        if (this.target instanceof ReleaseStrategy && !StringUtils.hasText(this.methodName)) {
            this.strategy = (ReleaseStrategy) this.target;
            return;
        }
        if (this.target != null) {
            if (StringUtils.hasText(this.methodName)) {
                this.strategy = new MethodInvokingReleaseStrategy(this.target, this.methodName);
            } else {
                Method method = MessagingAnnotationUtils.findAnnotatedMethod(this.target,
                        org.springframework.integration.annotation.ReleaseStrategy.class);
                if (method != null) {
                    this.strategy = new MethodInvokingReleaseStrategy(this.target, method);
                } else {
                    if (logger.isWarnEnabled()) {
                        logger.warn("No ReleaseStrategy annotated method found on "
                                + this.target.getClass().getSimpleName()
                                + "; falling back to SequenceSizeReleaseStrategy, target:" + this.target
                                + ", methodName:" + this.methodName);
                    }
                }
            }
        } else {
            if (logger.isWarnEnabled()) {
                logger.warn("No target supplied; falling back to SequenceSizeReleaseStrategy");
            }
        }
    }

    @Override
    public ReleaseStrategy getObject() throws Exception {
        return this.strategy;
    }

    @Override
    public Class<?> getObjectType() {
        return ReleaseStrategy.class;
    }

    @Override
    public boolean isSingleton() {
        return true;
    }

}