org.springframework.integration.handler.ServiceActivatingHandler.java Source code

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Here is the source code for org.springframework.integration.handler.ServiceActivatingHandler.java

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/*
 * Copyright 2002-2019 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
 *
 *      https://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.handler;

import java.lang.reflect.Method;

import org.springframework.beans.factory.BeanFactoryAware;
import org.springframework.context.Lifecycle;
import org.springframework.core.convert.ConversionService;
import org.springframework.integration.annotation.ServiceActivator;
import org.springframework.lang.Nullable;
import org.springframework.messaging.Message;

/**
 * @author Mark Fisher
 * @author Artem Bilan
 * @author Gary Russell
 */
public class ServiceActivatingHandler extends AbstractReplyProducingMessageHandler implements Lifecycle {

    private final MessageProcessor<?> processor;

    public ServiceActivatingHandler(final Object object) {
        this(new MethodInvokingMessageProcessor<>(object, ServiceActivator.class));
    }

    public ServiceActivatingHandler(Object object, Method method) {
        this(new MethodInvokingMessageProcessor<>(object, method));
    }

    public ServiceActivatingHandler(Object object, String methodName) {
        this(new MethodInvokingMessageProcessor<>(object, methodName));
    }

    public <T> ServiceActivatingHandler(MessageProcessor<T> processor) {
        this.processor = processor;
    }

    @Override
    public String getComponentType() {
        return "service-activator";
    }

    @Override
    protected void doInit() {
        if (this.processor instanceof AbstractMessageProcessor) {
            ConversionService conversionService = getConversionService();
            if (conversionService != null) {
                ((AbstractMessageProcessor<?>) this.processor).setConversionService(conversionService);
            }
        }
        if (this.processor instanceof BeanFactoryAware && this.getBeanFactory() != null) {
            ((BeanFactoryAware) this.processor).setBeanFactory(this.getBeanFactory());
        }
    }

    @Override
    public void start() {
        if (this.processor instanceof Lifecycle) {
            ((Lifecycle) this.processor).start();
        }
    }

    @Override
    public void stop() {
        if (this.processor instanceof Lifecycle) {
            ((Lifecycle) this.processor).stop();
        }
    }

    @Override
    public boolean isRunning() {
        return !(this.processor instanceof Lifecycle) || ((Lifecycle) this.processor).isRunning();
    }

    @Override
    @Nullable
    protected Object handleRequestMessage(Message<?> message) {
        return this.processor.processMessage(message);
    }

    @Override
    public String toString() {
        return "ServiceActivator for [" + this.processor + "]"
                + (getComponentName() == null ? "" : " (" + getComponentName() + ")");
    }

}