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/*
* @(#)DestinationStore.java 1.32 08/28/07
*/
package com.sun.messaging.jmq.jmsserver.persist.inmemory;
import com.sun.messaging.jmq.util.log.Logger;
import com.sun.messaging.jmq.jmsserver.core.Destination;
import com.sun.messaging.jmq.jmsserver.core.DestinationUID;
import com.sun.messaging.jmq.jmsserver.Globals;
import com.sun.messaging.jmq.jmsserver.util.*;
import com.sun.messaging.jmq.jmsserver.resources.*;
import com.sun.messaging.jmq.jmsserver.persist.Store;
import java.io.*;
import java.util.*;
import java.util.concurrent.ConcurrentHashMap;
/**
* Keep track of all persisted destinations by using HashMap.
*/
class DestinationStore {
Logger logger = Globals.getLogger();
BrokerResources br = Globals.getBrokerResources();
// maps destination's ID -> Destination
private ConcurrentHashMap dstMap = null;
private InMemoryStore parent = null;
// when instantiated, all data are loaded
DestinationStore(InMemoryStore p) {
this.parent = p;
dstMap = new ConcurrentHashMap(64);
}
/**
* Store a Destination.
*
* @param destination the destination to be persisted
* @exception java.io.IOException if an error occurs while persisting
* the destination
* @exception com.sun.messaging.jmq.jmsserver.util.BrokerException if the same destination exists
* the store already
* @exception NullPointerException if <code>destination</code> is
* <code>null</code>
*/
void storeDestination(Destination destination)
throws IOException, BrokerException {
DestinationUID did = destination.getDestinationUID();
try {
Object oldValue = dstMap.putIfAbsent(did, destination);
if (oldValue != null) {
logger.log(Logger.ERROR, BrokerResources.E_DESTINATION_EXISTS_IN_STORE,
destination.getName());
throw new BrokerException(br.getString(
BrokerResources.E_DESTINATION_EXISTS_IN_STORE, destination.getName()));
}
} catch (RuntimeException e) {
logger.log(Logger.ERROR, BrokerResources.X_PERSIST_DESTINATION_FAILED,
destination.getName());
throw new BrokerException(br.getString(
BrokerResources.X_PERSIST_DESTINATION_FAILED,
destination.getName()), e);
}
}
/**
* Update the destination in the persistent store.
*
* @param destination the destination to be updated
* @exception com.sun.messaging.jmq.jmsserver.util.BrokerException if the destination is not found in the store
* or if an error occurs while updating the destination
*/
void updateDestination(Destination destination)
throws BrokerException {
DestinationUID did = destination.getDestinationUID();
try {
Object oldValue = dstMap.replace(did, destination);
if (oldValue == null) {
logger.log(Logger.ERROR,
BrokerResources.E_DESTINATION_NOT_FOUND_IN_STORE, destination.getName());
throw new BrokerException(
br.getString(BrokerResources.E_DESTINATION_NOT_FOUND_IN_STORE,
destination.getName()));
}
} catch (RuntimeException e) {
logger.log(Logger.ERROR,
BrokerResources.X_PERSIST_DESTINATION_FAILED, destination.getName());
throw new BrokerException(
br.getString(BrokerResources.X_PERSIST_DESTINATION_FAILED,
destination.getName()), e);
}
}
/**
* Remove the destination from the persistent store.
* All messages associated with the destination will be removed as well.
*
* @param destination the destination to be removed
* @exception com.sun.messaging.jmq.jmsserver.util.BrokerException if the destination is not found in the store
*/
void removeDestination(Destination destination)
throws BrokerException {
DestinationUID did = destination.getDestinationUID();
try {
Object oldValue = dstMap.remove(did);
if (oldValue == null) {
logger.log(Logger.ERROR,
BrokerResources.E_DESTINATION_NOT_FOUND_IN_STORE,
destination.getName());
throw new BrokerException(br.getString(
BrokerResources.E_DESTINATION_NOT_FOUND_IN_STORE,
destination.getName()));
}
// remove all messages associated with this destination
parent.getMsgStore().releaseMessageDir(did);
} catch (RuntimeException e) {
logger.log(Logger.ERROR,
BrokerResources.X_REMOVE_DESTINATION_FAILED,
destination.getName(), e);
throw new BrokerException(
br.getString(BrokerResources.X_REMOVE_DESTINATION_FAILED,
destination.getName()), e);
}
}
/**
* Retrieve the destination from the persistent store.
*
* @param did the destination to be retrieved
* @return a Destination object
*/
Destination getDestination(DestinationUID did) throws IOException {
return (Destination)dstMap.get(did);
}
/**
* Retrieve all destinations in the store.
*
* @return an array of Destination objects; a zero length array is
* returned if no destinations exist in the store
* @exception java.io.IOException if an error occurs while getting the data
*/
Destination[] getAllDestinations() throws IOException {
return (Destination[])dstMap.values().toArray(new Destination[0]);
}
// return the names of all persisted destination
Collection getDestinations() {
return dstMap.values();
}
/**
* Clear all destinations
*/
void clearAll(boolean clearMessages) {
if (Store.getDEBUG()) {
logger.log(Logger.DEBUGHIGH,
"DestinationStore.clearAll(" + clearMessages + ") called");
}
if (clearMessages) {
Iterator itr = dstMap.values().iterator();
while (itr.hasNext()) {
Destination dst = (Destination)itr.next();
DestinationUID did = dst.getDestinationUID();
parent.getMsgStore().releaseMessageDir(did);
}
}
dstMap.clear();
}
/**
* Get debug information about the store.
* @return A Hashtable of name value pair of information
*/
Hashtable getDebugState() {
Hashtable t = new Hashtable();
t.put("Destinations", String.valueOf(dstMap.size()));
return t;
}
void close(boolean cleanup) {
if (Store.getDEBUG()) {
logger.log(Logger.DEBUGHIGH,
"DestinationStore: closing, " + dstMap.size()+ " in-memory destinations");
}
}
// check whether the specified destination exists
// throw BrokerException if it does not exist
void checkDestination(DestinationUID did) throws BrokerException {
if (!dstMap.containsKey(did)) {
logger.log(Logger.ERROR,
BrokerResources.E_DESTINATION_NOT_FOUND_IN_STORE, did.toString());
throw new BrokerException(
br.getString(BrokerResources.E_DESTINATION_NOT_FOUND_IN_STORE,
did.toString()));
}
}
}