org.apache.hudi.org.apache.hadoop.hbase.monitoring.StateDumpServlet Maven / Gradle / Ivy
/**
*
* 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.hadoop.hbase.monitoring;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Map;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import org.apache.yetus.audience.InterfaceAudience;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.executor.ExecutorService;
import org.apache.hadoop.hbase.executor.ExecutorService.ExecutorStatus;
import org.apache.hadoop.hbase.util.VersionInfo;
@InterfaceAudience.Private
public abstract class StateDumpServlet extends HttpServlet {
static final long DEFAULT_TAIL_KB = 100;
private static final long serialVersionUID = 1L;
protected void dumpVersionInfo(PrintWriter out) {
VersionInfo.writeTo(out);
out.println("Hadoop " + org.apache.hadoop.util.VersionInfo.getVersion());
out.println("Source code repository " + org.apache.hadoop.util.VersionInfo.getUrl()
+ " revision=" + org.apache.hadoop.util.VersionInfo.getRevision());
out.println("Compiled by " + org.apache.hadoop.util.VersionInfo.getUser() +
" on " + org.apache.hadoop.util.VersionInfo.getDate());
}
protected boolean isShowQueueDump(Configuration conf){
return conf.getBoolean("hbase.regionserver.servlet.show.queuedump", true);
}
protected long getTailKbParam(HttpServletRequest request) {
String param = request.getParameter("tailkb");
if (param == null) {
return DEFAULT_TAIL_KB;
}
return Long.parseLong(param);
}
protected void dumpExecutors(ExecutorService service, PrintWriter out)
throws IOException {
if (service == null) {
out.println("ExecutorService is not initialized");
return;
}
Map statuses = service.getAllExecutorStatuses();
for (ExecutorStatus status : statuses.values()) {
status.dumpTo(out, " ");
}
}
}