org.springframework.integration.flow.config.FlowMessageHandlerFactoryBean.java Source code

Introduction

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

Source

/*
 * Copyright 2002-2011 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.flow.config;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.integration.MessageChannel;
import org.springframework.integration.config.AbstractSimpleMessageHandlerFactoryBean;
import org.springframework.integration.flow.Flow;
import org.springframework.integration.flow.PortConfiguration;
import org.springframework.integration.flow.handler.FlowMessageHandler;
import org.springframework.util.Assert;

/**
 * Creates an instance of {@link FlowMessageHandler}
 * @author David Turanski
 * 
 */
public class FlowMessageHandlerFactoryBean extends AbstractSimpleMessageHandlerFactoryBean
        implements InitializingBean {

    @SuppressWarnings("unused")
    private static Log logger = LogFactory.getLog(FlowMessageHandlerFactoryBean.class);

    private volatile Flow flow;

    private volatile String inputPortName;

    private volatile MessageChannel errorChannel;

    private volatile long timeout;

    // private volatile DirectChannel flowOutputChannel;

    private volatile PortConfiguration flowConfiguration;

    @Override
    protected FlowMessageHandler createHandler() {

        MessageChannel flowInputChannel = flow.resolveChannelName((String) flowConfiguration.getInputChannel());

        FlowMessageHandler flowMessageHandler = new FlowMessageHandler(flowInputChannel,
                flow.getFlowOutputChannel(), timeout);

        flowMessageHandler.setErrorChannel(this.errorChannel);

        return flowMessageHandler;
    }

    /**
     * 
     * @param flow the flow handled by the FlowMessageHandler
     */
    public void setFlow(Flow flow) {
        this.flow = flow;
    }

    /**
     * 
     * @param inputPortName the flow input port associated with the handler. If
     * not set and the flow defines only one input port, that will be used by
     * default.
     */
    public void setInputPortName(String inputPortName) {
        this.inputPortName = inputPortName;
    }

    /**
     * 
     * @param timeout send timeout for the handler
     */
    public void setTimeout(long timeout) {
        this.timeout = timeout;
    }

    /**
     * 
     * @param errorChannel
     */
    public void setErrorChannel(MessageChannel errorChannel) {
        this.errorChannel = errorChannel;
    }

    public void afterPropertiesSet() throws Exception {
        this.flowConfiguration = null;
        if (this.inputPortName == null) {
            Assert.isTrue(!(this.flow.getFlowConfiguration().getPortConfigurations().size() > 1),
                    "flow [" + this.flow.getBeanName()
                            + "] exposes multiple port configurations. Must specify an input port");

            this.flowConfiguration = this.flow.getFlowConfiguration().getPortConfigurations().get(0);
            this.inputPortName = this.flowConfiguration.getInputPortName();
        } else {
            this.flowConfiguration = this.flow.getFlowConfiguration()
                    .getConfigurationForInputPort(this.inputPortName);
        }
    }

}