/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.apache.oozie.service;
import org.apache.oozie.util.XLogFilter;
import org.apache.oozie.util.Instrumentable;
import org.apache.oozie.util.Instrumentation;
import org.apache.oozie.util.XLogStreamer;
import java.io.IOException;
import java.io.Writer;
import java.util.Map;
import java.util.Date;
/**
* Service that performs streaming of log files over Web Services if enabled in XLogService
*/
public class XLogStreamingService implements Service, Instrumentable {
private static final String CONF_PREFIX = Service.CONF_PREFIX + "XLogStreamingService.";
public static final String STREAM_BUFFER_LEN = CONF_PREFIX + "buffer.len";
protected int bufferLen;
/**
* Initialize the log streaming service.
*
* @param services services instance.
* @throws ServiceException thrown if the log streaming service could not be initialized.
*/
public void init(Services services) throws ServiceException {
bufferLen = ConfigurationService.getInt(services.getConf(), STREAM_BUFFER_LEN);
}
/**
* Destroy the log streaming service.
*/
public void destroy() {
}
/**
* Return the public interface for log streaming service.
*
* @return {@link XLogStreamingService}.
*/
public Class<? extends Service> getInterface() {
return XLogStreamingService.class;
}
/**
* Instruments the log streaming service.
*
* @param instr instrumentation to use.
*/
public void instrument(Instrumentation instr) {
// nothing to instrument
}
/**
* Stream the log of a job.
*
* @param filter log streamer filter.
* @param startTime start time for log events to filter.
* @param endTime end time for log events to filter.
* @param writer writer to stream the log to.
* @param params additional parameters from the request
* @throws IOException thrown if the log cannot be streamed.
*/
public void streamLog(XLogFilter filter, Date startTime, Date endTime, Writer writer, Map<String, String[]> params)
throws IOException {
XLogService xLogService = Services.get().get(XLogService.class);
if (xLogService.getLogOverWS()) {
new XLogStreamer(filter, xLogService.getOozieLogPath(), xLogService.getOozieLogName(),
xLogService.getOozieLogRotation()).streamLog(writer, startTime, endTime, bufferLen);
}
else {
writer.write("Log streaming disabled!!");
}
}
public int getBufferLen() {
return bufferLen;
}
}