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/*
* SonarQube
* Copyright (C) 2009-2025 SonarSource SA
* mailto:info AT sonarsource DOT com
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 3 of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
package org.sonar.application.process;
import java.net.ConnectException;
import org.elasticsearch.ElasticsearchException;
import org.elasticsearch.cluster.health.ClusterHealthStatus;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.sonar.application.es.EsConnector;
import org.sonar.process.ProcessId;
import static org.sonar.application.process.EsManagedProcess.Status.CONNECTION_REFUSED;
import static org.sonar.application.process.EsManagedProcess.Status.GREEN;
import static org.sonar.application.process.EsManagedProcess.Status.KO;
import static org.sonar.application.process.EsManagedProcess.Status.RED;
import static org.sonar.application.process.EsManagedProcess.Status.YELLOW;
public class EsManagedProcess extends AbstractManagedProcess {
private static final Logger LOG = LoggerFactory.getLogger(EsManagedProcess.class);
private static final int WAIT_FOR_UP_DELAY_IN_MILLIS = 100;
private volatile boolean nodeOperational = false;
private final int waitForUpTimeout;
private final EsConnector esConnector;
public EsManagedProcess(Process process, ProcessId processId, EsConnector esConnector) {
this(process, processId, esConnector, 10 * 60);
}
EsManagedProcess(Process process, ProcessId processId, EsConnector esConnector, int waitForUpTimeout) {
super(process, processId);
this.esConnector = esConnector;
this.waitForUpTimeout = waitForUpTimeout;
}
@Override
public boolean isOperational() {
if (nodeOperational) {
return true;
}
boolean flag = false;
try {
flag = checkOperational();
} catch (InterruptedException e) {
LOG.trace("Interrupted while checking ES node is operational", e);
Thread.currentThread().interrupt();
} finally {
if (flag) {
esConnector.stop();
nodeOperational = true;
}
}
return nodeOperational;
}
private boolean checkOperational() throws InterruptedException {
int i = 0;
Status status = checkStatus();
do {
if (status != Status.CONNECTION_REFUSED) {
break;
} else {
Thread.sleep(WAIT_FOR_UP_DELAY_IN_MILLIS);
i++;
status = checkStatus();
}
} while (i < waitForUpTimeout);
return status == YELLOW || status == GREEN;
}
private Status checkStatus() {
try {
return esConnector.getClusterHealthStatus()
.map(EsManagedProcess::convert)
.orElse(CONNECTION_REFUSED);
} catch (ElasticsearchException e) {
if (e.getRootCause() instanceof ConnectException) {
return CONNECTION_REFUSED;
}
LOG.error("Failed to check status", e);
return KO;
} catch (Exception e) {
LOG.error("Failed to check status", e);
return KO;
}
}
private static Status convert(ClusterHealthStatus clusterHealthStatus) {
switch (clusterHealthStatus) {
case GREEN:
return GREEN;
case YELLOW:
return YELLOW;
case RED:
return RED;
default:
return KO;
}
}
enum Status {
CONNECTION_REFUSED, KO, RED, YELLOW, GREEN
}
@Override
public void askForStop() {
askForHardStop();
}
@Override
public void askForHardStop() {
process.destroy();
}
@Override
public boolean askedForRestart() {
// ES does not support asking for restart
return false;
}
@Override
public void acknowledgeAskForRestart() {
// nothing to do
}
}
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