org.springframework.integration.syslog.DefaultMessageConverter.java Source code

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Here is the source code for org.springframework.integration.syslog.DefaultMessageConverter.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.syslog;

import java.util.Arrays;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;

import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.BeanFactoryAware;
import org.springframework.integration.support.DefaultMessageBuilderFactory;
import org.springframework.integration.support.MessageBuilderFactory;
import org.springframework.integration.support.utils.IntegrationUtils;
import org.springframework.integration.transformer.SyslogToMapTransformer;
import org.springframework.messaging.Message;

/**
 * Default {@link MessageConverter}; delegates to a {@link SyslogToMapTransformer} to
 * convert the payload to a map of values and also provides some of the map contents as
 * message headers. See @link {@link SyslogHeaders} for the headers that are mapped.
 *
 * @author Gary Russell
 * @author David Liu
 * @since 3.0
 */
public class DefaultMessageConverter implements MessageConverter, BeanFactoryAware {

    private final SyslogToMapTransformer transformer = new SyslogToMapTransformer();

    public static final Set<String> SYSLOG_PAYLOAD_ENTRIES = new HashSet<String>(
            Arrays.asList(new String[] { SyslogToMapTransformer.MESSAGE, SyslogToMapTransformer.UNDECODED }));

    private volatile MessageBuilderFactory messageBuilderFactory = new DefaultMessageBuilderFactory();

    private volatile boolean messageBuilderFactorySet;

    private volatile boolean asMap = true;

    private BeanFactory beanFactory;

    /**
     * Set false will leave the payload as the original complete syslog.
     * @param asMap boolean flag.
     */
    public void setAsMap(boolean asMap) {
        this.asMap = asMap;
    }

    protected boolean asMap() {
        return this.asMap;
    }

    @Override
    public final void setBeanFactory(BeanFactory beanFactory) {
        this.beanFactory = beanFactory;
    }

    protected MessageBuilderFactory getMessageBuilderFactory() {
        if (!this.messageBuilderFactorySet) {
            if (this.beanFactory != null) {
                this.messageBuilderFactory = IntegrationUtils.getMessageBuilderFactory(this.beanFactory);
            }
            this.messageBuilderFactorySet = true;
        }
        return this.messageBuilderFactory;
    }

    @Override
    public Message<?> fromSyslog(Message<?> message) {
        Map<String, ?> map = this.transformer.doTransform(message);
        Map<String, Object> out = new HashMap<String, Object>();
        for (Entry<String, ?> entry : map.entrySet()) {
            String key = entry.getKey();
            if (!SYSLOG_PAYLOAD_ENTRIES.contains(key)) {
                out.put(SyslogHeaders.PREFIX + entry.getKey(), entry.getValue());
            }
        }
        return getMessageBuilderFactory().withPayload(this.asMap ? map : message.getPayload())
                .copyHeaders(message.getHeaders()).copyHeaders(out).build();
    }

}