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/*
* @(#)InterestStore.java 1.35 08/28/07
*/
package com.sun.messaging.jmq.jmsserver.persist.file;
import com.sun.messaging.jmq.jmsserver.core.ConsumerUID;
import com.sun.messaging.jmq.jmsserver.core.Consumer;
import com.sun.messaging.jmq.util.log.Logger;
import com.sun.messaging.jmq.util.SizeString;
import com.sun.messaging.jmq.jmsserver.util.*;
import com.sun.messaging.jmq.jmsserver.Globals;
import com.sun.messaging.jmq.jmsserver.Broker;
import com.sun.messaging.jmq.jmsserver.config.*;
import com.sun.messaging.jmq.jmsserver.resources.*;
import com.sun.messaging.jmq.jmsserver.persist.api.Store;
import com.sun.messaging.jmq.jmsserver.persist.api.LoadException;
import com.sun.messaging.jmq.io.disk.PHashMap;
import com.sun.messaging.jmq.io.disk.PHashMapLoadException;
import com.sun.messaging.jmq.io.disk.VRFileWarning;
import java.io.*;
import java.util.*;
/**
* Keep track of all persisted Interest objects
*/
class InterestStore {
Logger logger = Globals.getLogger();
BrokerResources br = Globals.getBrokerResources();
BrokerConfig config = Globals.getConfig();
// initial size of backing file
static final String INTEREST_FILE_SIZE_PROP
= FileStore.FILE_PROP_PREFIX + "interest.file.size";
static final long DEFAULT_INTEREST_FILE_SIZE = 1024; // 1024k = 1M
static final String BASENAME = "interest"; // data file
private File backingFile = null;
// cache of all stored interests; maps interest id -> interest
private PHashMap interestMap = null;
private LoadException loadException = null;
/**
* When instantiated, all interests are loaded.
*/
InterestStore(FileStore p, File topDir, boolean clear) throws BrokerException {
SizeString filesize = config.getSizeProperty(INTEREST_FILE_SIZE_PROP,
DEFAULT_INTEREST_FILE_SIZE);
backingFile = new File(topDir, BASENAME);
try {
// safe=false; data synchronization is controlled by caller
interestMap = new PHashMap(backingFile, filesize.getBytes(),
false, clear, Globals.isMinimumWritesFileStore(), Broker.isInProcess());
} catch (IOException e) {
throw new BrokerException(br.getString(
br.X_LOAD_INTERESTS_FAILED), e);
}
try {
interestMap.load(p);
} catch (IOException e) {
throw new BrokerException(br.getString(
br.X_LOAD_INTERESTS_FAILED), e);
} catch (ClassNotFoundException e) {
throw new BrokerException(br.getString(
br.X_LOAD_INTERESTS_FAILED), e);
} catch (PHashMapLoadException le) {
while (le != null) {
logger.log(Logger.WARNING, br.X_FAILED_TO_LOAD_A_CONSUMER, le);
// save info in LoadException
LoadException e = new LoadException(le.getMessage(),
le.getCause());
e.setKey(le.getKey());
e.setValue(le.getValue());
e.setKeyCause(le.getKeyCause());
e.setValueCause(le.getValueCause());
e.setNextException(loadException);
loadException = e;
// get the chained exception
le = le.getNextException();
}
}
VRFileWarning w = interestMap.getWarning();
if (w != null) {
logger.log(logger.WARNING,
"possible loss of consumer data", w);
}
if (clear && Store.getDEBUG()) {
logger.log(logger.DEBUGHIGH,
"InterestStore initialized with clear option");
}
if (Store.getDEBUG()) {
logger.log(logger.DEBUG, "LOADED " + (interestMap.size()) +
" INTERESTS");
}
}
/**
* When instantiated, upgrade data from old store
* if clear is true, just remove all data in old store
*/
InterestStore(FileStore p, File topDir, File oldDir, boolean clear)
throws BrokerException {
SizeString filesize = config.getSizeProperty(INTEREST_FILE_SIZE_PROP,
DEFAULT_INTEREST_FILE_SIZE);
File oldFile = new File(oldDir, BASENAME);
PHashMap olddata = null;
backingFile = new File(topDir, BASENAME);
try {
// safe=false; reset=clear
olddata = new PHashMap(oldFile, false, clear,
Globals.isMinimumWritesFileStore(), Broker.isInProcess());
} catch (IOException e) {
logger.log(logger.ERROR, br.X_UPGRADE_INTERESTS_FAILED,
oldFile, backingFile, e);
throw new BrokerException(br.getString(
br.X_UPGRADE_INTERESTS_FAILED, oldFile,
backingFile), e);
}
try {
olddata.load(p);
} catch (IOException e) {
logger.log(logger.ERROR, br.X_UPGRADE_INTERESTS_FAILED,
oldFile, backingFile, e);
throw new BrokerException(br.getString(
br.X_UPGRADE_INTERESTS_FAILED, oldFile,
backingFile), e);
} catch (ClassNotFoundException e) {
logger.log(logger.ERROR, br.X_UPGRADE_INTERESTS_FAILED,
oldFile, backingFile, e);
throw new BrokerException(br.getString(
br.X_UPGRADE_INTERESTS_FAILED, oldFile,
backingFile), e);
} catch (PHashMapLoadException le) {
while (le != null) {
logger.log(Logger.WARNING,
br.X_FAILED_TO_LOAD_A_CONSUMER_FROM_OLDSTORE, le);
// save info in LoadException
LoadException e = new LoadException(le.getMessage(),
le.getCause());
e.setKey(le.getKey());
e.setValue(le.getValue());
e.setKeyCause(le.getKeyCause());
e.setValueCause(le.getValueCause());
e.setNextException(loadException);
loadException = e;
// get the chained exception
le = le.getNextException();
}
}
VRFileWarning w = olddata.getWarning();
if (w != null) {
logger.log(logger.WARNING,
"possible loss of consumer data in old store", w);
}
try {
// safe=false; reset=false
interestMap = new PHashMap(backingFile, oldFile.length(), false, false,
Globals.isMinimumWritesFileStore(), Broker.isInProcess());
} catch (IOException e) {
logger.log(logger.ERROR, br.X_UPGRADE_INTERESTS_FAILED,
oldFile, backingFile, e);
throw new BrokerException(br.getString(
br.X_UPGRADE_INTERESTS_FAILED, oldFile,
backingFile), e);
}
try {
interestMap.load(p);
} catch (IOException e) {
// should not happen so throw exception
logger.log(logger.ERROR, br.X_UPGRADE_INTERESTS_FAILED,
oldFile, backingFile, e);
throw new BrokerException(br.getString(
br.X_UPGRADE_INTERESTS_FAILED, oldFile,
backingFile), e);
} catch (ClassNotFoundException e) {
// should not happen so throw exception
logger.log(logger.ERROR, br.X_UPGRADE_INTERESTS_FAILED,
oldFile, backingFile, e);
throw new BrokerException(br.getString(
br.X_UPGRADE_INTERESTS_FAILED, oldFile,
backingFile), e);
} catch (PHashMapLoadException e) {
// should not happen so throw exception
logger.log(logger.ERROR, br.X_UPGRADE_INTERESTS_FAILED,
oldFile, backingFile, e);
throw new BrokerException(br.getString(
br.X_UPGRADE_INTERESTS_FAILED, oldFile,
backingFile), e);
}
w = interestMap.getWarning();
if (w != null) {
logger.log(logger.WARNING,
"possible loss of consumer data", w);
}
Iterator itr = olddata.entrySet().iterator();
while (itr.hasNext()) {
Map.Entry entry = (Map.Entry)itr.next();
Object key = entry.getKey();
Object value = entry.getValue();
interestMap.put(key, value);
}
olddata.close();
if (Store.getDEBUG()) {
logger.log(logger.DEBUG, "UPGRADED " + (interestMap.size()) +
" INTERESTS");
}
// if upgradeNoBackup, remove oldfile
if (p.upgradeNoBackup()) {
if (!oldFile.delete()) {
logger.log(logger.ERROR, br.I_DELETE_FILE_FAILED, oldFile);
}
}
}
LoadException getLoadException() {
return loadException;
}
private void sync() throws BrokerException {
try {
if(Store.getDEBUG_SYNC())
{
String msg = "InterestStore sync()";
logger.log(Logger.DEBUG,msg);
}
interestMap.force();
} catch (IOException e) {
throw new BrokerException(
"Failed to synchronize file: " + backingFile, e);
}
}
/**
* Get debug information about the store.
* @return A Hashtable of name value pair of information
*/
Hashtable getDebugState() {
Hashtable t = new Hashtable();
t.put("Consumers", String.valueOf(interestMap.size()));
return t;
}
/**
* Print out usage info in the interest directory.
*/
public void printInfo(PrintStream out) {
out.println("\nInterests");
out.println("---------");
out.println("backing file: " + backingFile);
out.println("number of interests: " + interestMap.size());
}
/**
* Store an interest which is uniquely identified by it's interest id.
*
* @param interest interest to be persisted
* @exception IOException if an error occurs while persisting the interest
* @exception BrokerException if an interest with the same id exists
* in the store already
*/
void storeInterest(Consumer interest, boolean sync)
throws IOException, BrokerException {
ConsumerUID id = interest.getConsumerUID();
try {
Object oldValue = interestMap.putIfAbsent(id, interest);
if (oldValue != null) {
logger.log(logger.ERROR, br.E_INTEREST_EXISTS_IN_STORE, id,
interest.getDestinationUID().getLongString());
throw new BrokerException(
br.getString(br.E_INTEREST_EXISTS_IN_STORE, id,
interest.getDestinationUID().getLongString()));
}
if (sync) {
sync();
}
} catch (RuntimeException e) {
logger.log(logger.ERROR, br.X_PERSIST_INTEREST_FAILED, id, e);
throw e;
}
}
/**
* Remove the interest from the persistent store.
*
* @param interest the interest to be removed
* @exception IOException if an error occurs while removing the interest
* @exception BrokerException if the interest is not found in the store
*/
void removeInterest(Consumer interest, boolean sync)
throws IOException, BrokerException {
Object oldinterest = null;
ConsumerUID id = interest.getConsumerUID();
try {
oldinterest = interestMap.remove(id);
if (oldinterest == null) {
logger.log(logger.ERROR,
br.E_INTEREST_NOT_FOUND_IN_STORE, id,
interest.getDestinationUID().getLongString());
throw new BrokerException(
br.getString(br.E_INTEREST_NOT_FOUND_IN_STORE,
id, interest.getDestinationUID().getLongString()));
}
if (sync) {
sync();
}
} catch (RuntimeException e) {
logger.log(logger.ERROR, br.X_REMOVE_INTEREST_FAILED, id);
throw new BrokerException(
br.getString(br.X_REMOVE_INTEREST_FAILED, id), e);
}
}
/**
* Retrieve all interests in the store.
* Will return as many interests as we can read.
* Any interests that are retrieved unsuccessfully will be logged as a
* warning.
*
* @return an array of Interest objects; a zero length array is
* returned if no interests exist in the store
* @exception IOException if an error occurs while getting the data
*/
Consumer[] getAllInterests() throws IOException {
return (Consumer[])interestMap.values().toArray(new Consumer[0]);
}
// clear the store; when this method returns, the store has a state
// that is the same as an empty store (same as when InterestStore
// is instantiated with the clear argument set to true
void clearAll(boolean sync) {
if (Store.getDEBUG()) {
logger.log(logger.DEBUGHIGH, "InterestStore.clearAll() called");
}
interestMap.clear();
if (sync) {
try {
sync();
} catch (BrokerException e) {
logger.log(logger.ERROR,
"Got exception while synchronizing data to disk", e);
}
}
}
void close(boolean cleanup) {
if (Store.getDEBUG()) {
logger.log(logger.DEBUGHIGH,
"InterestStore: closing, "+interestMap.size()+
" persisted interests");
}
interestMap.close();
}
}
