AbstractThriftExporter.java

/*
 * Copyright 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.remoting.thrift;

import org.apache.thrift.TProcessor;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.obm.thrift.util.ThriftUtil;
import org.springframework.remoting.support.RemoteExporter;
import org.springframework.util.Assert;

/**
 * Exports a single bean, but does not "serve" the interface over a network connection. Requires
 * for the {@link #serviceInterface} property a reference to the "IFace" class inside the
 * Thrift generated class, e.g., {@code Foo.IFace.class}. The {@link #service} itself is any POJO,
 * but that POJO must implement the {@link #serviceInterface}.
 *
 * @author Josh Long
 */
abstract public class AbstractThriftExporter extends RemoteExporter implements InitializingBean {

    /**
     * the top-level class that was generated as part of thrift compilation for a given service interface
     */
    protected Class thriftClass;

    /**
     * handles dispatching incoming requests to the 'service'
     */
    protected TProcessor processor;

    @Override
    public void setServiceInterface(Class serviceInterface) {
        super.setServiceInterface(ThriftUtil.buildServiceInterface(serviceInterface));
        this.thriftClass = getServiceInterface().getEnclosingClass();
        Assert.notNull(this.thriftClass, "the 'thriftClass' can't be null");
    }

    @Override
    public void afterPropertiesSet() throws Exception {
        Class serviceInterface = getServiceInterface();
        Object service = getService();

        Assert.notNull(service, "the service must not be null");
        Assert.notNull(serviceInterface, "the serviceInterface must not be null");
        Assert.isTrue(serviceInterface.isAssignableFrom(service.getClass()));

        this.processor = ThriftUtil.buildProcessor(thriftClass, getServiceInterface(), getService());

    }

    public void setProcessor(TProcessor processor) {
        this.processor = processor;
    }

}