com.adaptris.core.jms.MetadataProducerSessionFactory.java Source code

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Here is the source code for com.adaptris.core.jms.MetadataProducerSessionFactory.java

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/*
 * Copyright 2015 Adaptris Ltd.
 * 
 * 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 com.adaptris.core.jms;

import static org.apache.commons.lang.StringUtils.defaultIfEmpty;

import javax.jms.JMSException;

import org.hibernate.validator.constraints.NotBlank;

import com.adaptris.annotation.DisplayOrder;
import com.adaptris.core.AdaptrisMessage;
import com.adaptris.core.util.Args;
import com.thoughtworks.xstream.annotations.XStreamAlias;

/**
 * Implementation of {@link ProducerSessionFactory} that creates a new session/producer based on message size.
 * 
 * <p>
 * This implementaton refreshes the session based whether an item of metadata evaluates to 'true'
 * </p>
 * 
 * @config jms-metadata-producer-session
 * 
 * @author lchan
 * 
 */
@XStreamAlias("jms-metadata-producer-session")
@DisplayOrder(order = { "metadataKey" })
public class MetadataProducerSessionFactory extends ProducerSessionFactoryImpl {

    private static final String DEFAULT_METADATA_KEY = "newJmsSession";
    @NotBlank
    private String metadataKey;

    public MetadataProducerSessionFactory() {
        super();
        setMetadataKey(DEFAULT_METADATA_KEY);
    }

    public MetadataProducerSessionFactory(String key) {
        this();
        setMetadataKey(key);
    }

    @Override
    public ProducerSession createProducerSession(JmsProducerImpl producer, AdaptrisMessage msg)
            throws JMSException {
        boolean newSession = newSessionRequired(msg);
        if (newSession || session == null) {
            if (newSession)
                log.trace("Metadata Key {} is true, new Session", getMetadataKey());
            closeQuietly(session);
            session = createProducerSession(producer);
        }
        return session;
    }

    boolean newSessionRequired(AdaptrisMessage msg) {
        return msg.containsKey(getMetadataKey())
                && Boolean.valueOf(defaultIfEmpty(msg.getMetadataValue(getMetadataKey()), "false")).booleanValue();
    }

    public String getMetadataKey() {
        return metadataKey;
    }

    /**
     * Set the metadata key which will cause a session to be refreshed.
     * 
     * @param key the metadata key, defaults to 'newJmsSession'
     */
    public void setMetadataKey(String key) {
        this.metadataKey = Args.notEmpty(key, "metadata key");
    }

}