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package com.sun.enterprise.admin.util;
import com.sun.enterprise.config.serverbeans.Domain;
import com.sun.enterprise.config.serverbeans.Server;
import java.util.logging.Level;
import org.glassfish.api.Startup;
import org.glassfish.api.admin.*;
import org.glassfish.api.admin.ServerEnvironment;
import org.jvnet.hk2.annotations.Inject;
import org.jvnet.hk2.annotations.Scoped;
import org.jvnet.hk2.annotations.Service;
import org.jvnet.hk2.component.Singleton;
import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.concurrent.Future;
import java.util.logging.Logger;
/**
* This service is called at startup and parses the instance state file
* @author Vijay Ramachandran
*/
@Service
@Scoped(Singleton.class)
public class InstanceStateService implements Startup {
@Inject
private ServerEnvironment serverEnv;
@Inject
private Domain domain;
@Inject
private Logger logger;
@Inject
private CommandThreadPool cmdPool;
private InstanceStateFileProcessor stateProcessor;
private HashMap instanceStates;
private final int MAX_RECORDED_FAILED_COMMANDS = 10;
public InstanceStateService() {}
/*
* Perform lazy-initialization for the object, since this InstanceStateService
* is not needed if there are not any instances.
*/
private void init() {
if (instanceStates != null) return;
instanceStates = new HashMap();
File stateFile = new File(serverEnv.getConfigDirPath().getAbsolutePath(),
".instancestate");
try {
stateProcessor = new InstanceStateFileProcessor(instanceStates,
stateFile);
} catch (IOException ioe) {
logger.log(Level.INFO, "unable to read instance state file {0}, recreating", stateFile);
instanceStates = new HashMap();
// Even though instances may already exist, do not populate the
// instancesStates array because it will be repopulated as it is
// used. Populating it early causes problems during instance
// creation.
try {
stateProcessor = InstanceStateFileProcessor.createNew(instanceStates, stateFile);
} catch (IOException ex) {
logger.log(Level.SEVERE, "unable to create instance state file " + stateFile, ex);
stateProcessor = null;
}
}
}
public synchronized void addServerToStateService(String instanceName) {
init();
instanceStates.put(instanceName, new InstanceState(InstanceState.StateType.NEVER_STARTED));
try {
stateProcessor.addNewServer(instanceName);
} catch (Exception e) {
logger.log(Level.SEVERE, "Error while adding new server state to instance state: {0}", e.getLocalizedMessage());
}
}
public synchronized void addFailedCommandToInstance(String instance, String cmd, ParameterMap params) {
init();
String cmdDetails = cmd;
String defArg = params.getOne("DEFAULT");
if (defArg != null) cmdDetails += " " + defArg;
try {
InstanceState i = instanceStates.get(instance);
if (i != null && i.getState() != InstanceState.StateType.NEVER_STARTED &&
i.getFailedCommands().size() < MAX_RECORDED_FAILED_COMMANDS) {
i.addFailedCommands(cmdDetails);
stateProcessor.addFailedCommand(instance, cmdDetails);
}
} catch (Exception e) {
logger.log(Level.SEVERE, "Error while adding failed command to instance state: {0}", e.getLocalizedMessage());
}
}
public synchronized void removeFailedCommandsForInstance(String instance) {
init();
try {
InstanceState i = instanceStates.get(instance);
if(i != null) {
i.removeFailedCommands();
stateProcessor.removeFailedCommands(instance);
}
} catch (Exception e) {
logger.log(Level.SEVERE, "Error while removing failed commands from instance state: {0}", e.getLocalizedMessage());
}
}
public InstanceState.StateType getState(String instanceName) {
init();
InstanceState s = instanceStates.get(instanceName);
if (s == null)
return InstanceState.StateType.NEVER_STARTED;
return s.getState();
}
public List getFailedCommands(String instanceName) {
init();
InstanceState s = instanceStates.get(instanceName);
if(s == null)
return new ArrayList();
return s.getFailedCommands();
}
public synchronized InstanceState.StateType setState(String name, InstanceState.StateType newState, boolean force) {
init();
boolean updateXML = false;
InstanceState.StateType ret = newState;
InstanceState is = instanceStates.get(name);
InstanceState.StateType currState;
if (is == null || (currState = is.getState()) == null) {
instanceStates.put(name, new InstanceState(newState));
updateXML = true;
ret = newState;
} else if (!force && currState == InstanceState.StateType.RESTART_REQUIRED) {
// If current state is RESTART_REQUIRED, no updates to state is allowed because
// only an instance restart can move this instance out of RESTART_REQD state
updateXML = false;
ret = currState;
} else if (!force && currState == InstanceState.StateType.NEVER_STARTED &&
(newState == InstanceState.StateType.NOT_RUNNING ||
newState == InstanceState.StateType.RESTART_REQUIRED ||
newState == InstanceState.StateType.NO_RESPONSE)) {
// invalid state change
updateXML = false;
ret = currState;
} else if (!currState.equals(newState)) {
instanceStates.get(name).setState(newState);
updateXML = true;
ret = newState;
}
try {
if (updateXML) {
stateProcessor.updateState(name, newState.getDescription());
}
} catch (Exception e) {
logger.log(Level.SEVERE, "Error while setting instance state: {0}", e.getLocalizedMessage());
}
return ret;
}
public synchronized void removeInstanceFromStateService(String name) {
init();
instanceStates.remove(name);
try {
stateProcessor.removeInstanceNode(name);
} catch (Exception e) {
logger.log(Level.SEVERE, "Error while removing instance: {0}", e.getLocalizedMessage());
}
}
/*
* For now, this just submits the job directly to the pool. In the future
* it might be possible to avoid submitting the job
*/
public Future submitJob(Server server, InstanceCommand ice, InstanceCommandResult r) {
return cmdPool.submitJob(ice, r);
}
@Override
public Lifecycle getLifecycle() {
return Startup.Lifecycle.SERVER;
}
}
