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package org.glassfish.gms.admin;
import com.sun.logging.LogDomains;
import org.glassfish.gms.bootstrap.GMSAdapterService;
import org.glassfish.gms.bootstrap.GMSAdapter;
import com.sun.enterprise.config.serverbeans.*;
import com.sun.enterprise.ee.cms.core.GMSConstants;
import org.glassfish.api.ActionReport;
import org.glassfish.api.Param;
import org.glassfish.api.admin.*;
import org.jvnet.hk2.annotations.Inject;
import org.jvnet.hk2.annotations.Scoped;
import org.jvnet.hk2.annotations.Service;
import org.jvnet.hk2.component.Habitat;
import org.jvnet.hk2.component.PerLookup;
import java.util.*;
import com.sun.enterprise.config.serverbeans.Domain;
import com.sun.enterprise.ee.cms.core.GroupManagementService;
import java.util.LinkedList;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;
@Service(name = "_gms-announce-before-start-cluster-command")
@Supplemental(value = "start-cluster", on = Supplemental.Timing.Before, ifFailure = FailurePolicy.Warn)
@Scoped(PerLookup.class)
public class GMSAnnounceBeforeStartClusterCommand implements AdminCommand {
private static final Logger logger = LogDomains.getLogger(
GMSAnnounceBeforeStartClusterCommand.class, LogDomains.GMS_LOGGER);
@Inject
private ServerEnvironment env;
@Inject
private Habitat habitat;
@Param(optional = false, primary = true)
private String clusterName;
@Inject
private Domain domain;
@Inject
private CommandRunner runner;
@Param(optional = true, defaultValue = "false")
private boolean verbose;
@Inject
GMSAdapterService gmsAdapterService;
private GroupManagementService gms = null;
private boolean gmsStartCluster = false;
private List clusterMembers = EMPTY_LIST;
private GMSAdapter gmsadapter = null;
static final private List EMPTY_LIST = new LinkedList();
@Override
public void execute(AdminCommandContext context) {
ActionReport report = context.getActionReport();
try {
if (gmsAdapterService.isGmsEnabled()) {
gmsadapter = gmsAdapterService.getGMSAdapterByName(clusterName);
// gmsadapter can be null if GMSEnabled=false for clusterName.
if (gmsadapter != null) {
gms = gmsadapter.getModule();
if (gms != null) {
clusterMembers = getClusterMembers();
// no need to announce a zero instance cluster.
if (clusterMembers != null && clusterMembers.size() > 0) {
// one or more clustered instances for this cluster in domain.xml.
// now check if any clustered instance are already running.
// DAS is a SPECTATOR so it will not be in list of current core members.
// If one or more clustered instances is already running, do not consider this a GROUP_STARTUP,
// but treat as a series of individual INSTANCE_STARTUP for instances that do get started.
// no gms calls needed if not a GROUP_STARTUP.
List startedGMSMembers = gms.getGroupHandle().getCurrentCoreMembers();
if (startedGMSMembers.size() == 0) {
try {
// must be called on DAS only.
gms.announceGroupStartup(clusterName, GMSConstants.groupStartupState.INITIATED, clusterMembers);
gmsStartCluster = true;
} catch (Throwable t) {
// ensure gms group startup announcement does not interfere with starting cluster.
// any exception here should not interfere with starting cluster.
logger.log(Level.WARNING,
"cluster.start.exception",
t.getLocalizedMessage());
}
} // else from GMS perspective treat remaining instances getting started as INSTANCE_START, not GROUP_START.
// nothing gms specific to do for this case.
}
}
}
}
} finally {
if (gms != null) {
GMSAnnounceSupplementalInfo result = new GMSAnnounceSupplementalInfo(clusterMembers, gmsStartCluster, gmsadapter);
report.setResultType(GMSAnnounceSupplementalInfo.class, result);
}
}
}
private List getClusterMembers() {
List clusterMembers = EMPTY_LIST;
com.sun.enterprise.config.serverbeans.Cluster cluster = domain.getClusterNamed(clusterName);
List targetServers = null;
if (cluster != null) {
// Get the list of servers in the cluster.
targetServers = domain.getServersInTarget(clusterName);
if (targetServers != null) {
clusterMembers = new ArrayList(targetServers.size());
for (Server server : targetServers) {
clusterMembers.add(server.getName());
}
}
}
return clusterMembers;
}
}