sipackage.inbound.SIAdapterUpperPrefixPollingChannelAdapter.java Source code

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Here is the source code for sipackage.inbound.SIAdapterUpperPrefixPollingChannelAdapter.java

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/*
 * Copyright 2002-2013 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 sipackage.inbound;

import org.springframework.integration.Message;
import org.springframework.integration.context.IntegrationObjectSupport;
import org.springframework.integration.core.MessageSource;
import org.springframework.integration.support.MessageBuilder;
import org.springframework.util.Assert;

import sipackage.core.SIAdapterUpperPrefixExecutor;

/**
 * @author SI-TEMPLATE-AUTHOR
 * @since SI-TEMPLATE-VERSION
 *
 */
public class SIAdapterUpperPrefixPollingChannelAdapter extends IntegrationObjectSupport
        implements MessageSource<Object> {

    private final SIAdapterUpperPrefixExecutor siAdapterLowerPrefixExecutor;

    /**
     * Constructor taking a {@link SIAdapterUpperPrefixExecutor} that provide all required SIAdapterUpperPrefix
     * functionality.
     *
     * @param siAdapterLowerPrefixExecutor Must not be null.
     */
    public SIAdapterUpperPrefixPollingChannelAdapter(SIAdapterUpperPrefixExecutor siAdapterLowerPrefixExecutor) {
        super();
        Assert.notNull(siAdapterLowerPrefixExecutor, "siAdapterLowerPrefixExecutor must not be null.");
        this.siAdapterLowerPrefixExecutor = siAdapterLowerPrefixExecutor;
    }

    /**
     * Check for mandatory attributes
     */
    @Override
    protected void onInit() throws Exception {
        super.onInit();
    }

    /**
     * Uses {@link SIAdapterUpperPrefixExecutor#poll()} to executes the SIAdapterUpperPrefix operation.
     *
     * If {@link SIAdapterUpperPrefixExecutor#poll()} returns null, this method will return
     * <code>null</code>. Otherwise, a new {@link Message} is constructed and returned.
     */
    public Message<Object> receive() {

        final Object payload = siAdapterLowerPrefixExecutor.poll();

        if (payload == null) {
            return null;
        }

        return MessageBuilder.withPayload(payload).build();
    }

    @Override
    public String getComponentType() {
        return "siAdapterLowerPrefix:inbound-channel-adapter";
    }

}