StreamExceptionCatcher.java

/*
 * Copyright 2016 Christoph Böhme
 *
 * 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.culturegraph.mf.flowcontrol;

import org.culturegraph.mf.framework.FluxCommand;
import org.culturegraph.mf.framework.StreamReceiver;
import org.culturegraph.mf.framework.annotations.Description;
import org.culturegraph.mf.framework.annotations.In;
import org.culturegraph.mf.framework.annotations.Out;
import org.culturegraph.mf.framework.helpers.DefaultStreamPipe;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * Passes streams events through and catches exceptions.
 *
 * @author schaeferd
 *
 */
@Description("passes streams events through and catches exceptions.")
@In(StreamReceiver.class)
@Out(StreamReceiver.class)
@FluxCommand("catch-stream-exception")
public final class StreamExceptionCatcher extends
		DefaultStreamPipe<StreamReceiver> {

	private static final Logger LOG = LoggerFactory.getLogger(StreamExceptionCatcher.class);
	private static final String MSG_PATTERN = "{}{}";

	private final String logPrefix;

	public StreamExceptionCatcher() {
		this("");
	}

	public StreamExceptionCatcher(final String logPrefix) {
		super();
		this.logPrefix = logPrefix;
	}

	@Override
	public void startRecord(final String identifier) {
		try {
			getReceiver().startRecord(identifier);
		} catch(final Exception e) {
			LOG.error(MSG_PATTERN, logPrefix, "StartRecord" + identifier);
			LOG.error(MSG_PATTERN, logPrefix, e);
		}
	}

	@Override
	public void endRecord() {
		try {
			getReceiver().endRecord();
		} catch(final Exception e) {
			LOG.error(MSG_PATTERN, logPrefix, "endRecord");
			LOG.error(MSG_PATTERN, logPrefix, e);
		}
	}

	@Override
	public void startEntity(final String name) {
		try {
			getReceiver().startEntity(name);
		} catch(final Exception e) {
			LOG.error(MSG_PATTERN, logPrefix, "startEntity" + name);
			LOG.error(MSG_PATTERN, logPrefix, e);
		}
	}

	@Override
	public void endEntity() {
		try {
			getReceiver().endEntity();
		} catch(final Exception e) {
			LOG.error(MSG_PATTERN, logPrefix, "endEntity");
			LOG.error(MSG_PATTERN, logPrefix, e);
		}
	}

	@Override
	public void literal(final String name, final String value) {
		try {
			getReceiver().literal(name, value);
		} catch(final Exception e) {
			LOG.error(MSG_PATTERN, logPrefix, "literal " + name +" " + value);
			LOG.error(MSG_PATTERN, logPrefix, e);
		}
	}

}