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package com.sun.ejb.spi.distributed;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;
import java.util.concurrent.ConcurrentHashMap;
import java.util.logging.Level;
import java.util.logging.Logger;
import com.sun.logging.LogDomains;
class DistributedReadOnlyBeanServiceImpl
implements DistributedReadOnlyBeanService {
private static final Logger _logger =
LogDomains.getLogger(LogDomains.EJB_LOGGER);
private ConcurrentHashMap<Long, ReadOnlyBeanRefreshHandlerInfo> refreshHandlers
= new ConcurrentHashMap<Long, ReadOnlyBeanRefreshHandlerInfo>();
private DistributedReadOnlyBeanNotifier robNotifier;
public void setDistributedReadOnlyBeanNotifier(
DistributedReadOnlyBeanNotifier notifier) {
this.robNotifier = notifier;
_logger.log(Level.INFO, "Registered ReadOnlyBeanNotifier: "
+ notifier);
}
public void addReadOnlyBeanRefreshEventHandler(
long ejbID, ClassLoader loader,
ReadOnlyBeanRefreshEventHandler handler) {
refreshHandlers.put(ejbID, new ReadOnlyBeanRefreshHandlerInfo(
ejbID, loader, handler));
_logger.log(Level.INFO, "Registered ReadOnlyBeanRefreshEventHandler: "
+ ejbID + "; " + handler);
}
public void removeReadOnlyBeanRefreshEventHandler(long ejbID) {
refreshHandlers.remove(ejbID);
}
public void notifyRefresh(long ejbID, Object pk) {
if (robNotifier != null) {
byte[] pkData = null;
ByteArrayOutputStream bos = null;
ObjectOutputStream oos = null;
try {
bos = new ByteArrayOutputStream();
oos = new ObjectOutputStream(bos);
oos.writeObject(pk);
oos.flush();
bos.flush();
pkData = bos.toByteArray();
robNotifier.notifyRefresh(ejbID, pkData);
} catch (Exception ex) {
_logger.log(Level.WARNING, "Error during notifyRefresh", ex);
} finally {
if (oos != null) {
try { oos.close(); } catch(IOException ioEx) {};
}
if (bos != null) {
try { bos.close(); } catch(IOException ioEx) {};
}
}
} else {
if (_logger.isLoggable(Level.FINE)) {
_logger.log(Level.FINE,
"DistributedReadOnlyBeanService ignoring request "
+ "for notifyRefresh: " + ejbID);
}
}
}
public void notifyRefreshAll(long ejbID) {
if (robNotifier != null) {
robNotifier.notifyRefreshAll(ejbID);
} else {
if (_logger.isLoggable(Level.FINE)) {
_logger.log(Level.FINE,
"DistributedReadOnlyBeanService ignoring request "
+ "for notifyRefreshAll: " + ejbID);
}
}
}
public void handleRefreshRequest(long ejbID, byte[] pkData) {
refreshRequestReceived(false, ejbID, pkData);
}
public void handleRefreshAllRequest(long ejbID) {
refreshRequestReceived(true, ejbID, null);
}
private void refreshRequestReceived(boolean refreshAll,
long ejbID, byte[] pkData) {
final ReadOnlyBeanRefreshHandlerInfo info = refreshHandlers.get(ejbID);
if (info == null) {
//TODO: Log something
return;
}
final Thread currentThread = Thread.currentThread();
final ClassLoader prevClassLoader = currentThread.getContextClassLoader();
try {
if(System.getSecurityManager() == null) {
currentThread.setContextClassLoader(info.loader);
} else {
java.security.AccessController.doPrivileged(
new java.security.PrivilegedAction() {
public java.lang.Object run() {
currentThread.setContextClassLoader(info.loader);
return null;
}
});
}
if (! refreshAll) {
ByteArrayInputStream bis = null;
ObjectInputStream ois = null;
Serializable pk = null;
try {
bis = new ByteArrayInputStream(pkData);
ois = new ObjectInputStream(bis);
pk = (Serializable) ois.readObject();
} catch (IOException ioEx) {
_logger.log(Level.WARNING, "Error during refresh", ioEx);
} catch (ClassNotFoundException cnfEx) {
_logger.log(Level.WARNING, "Error during refresh", cnfEx);
} finally {
if (ois != null) {
try {
ois.close();
} catch(IOException ioEx) {
_logger.log(Level.WARNING,
"Error while closing object stream", ioEx);
};
}
if (bis != null) {
try {
bis.close();
} catch(IOException ioEx) {
_logger.log(Level.WARNING,
"Error while closing byte stream", ioEx);
};
}
}
if (pk != null) {
info.handler.handleRefreshRequest(pk);
}
} else {
info.handler.handleRefreshAllRequest();
}
} catch (Exception ex) {
_logger.log(Level.WARNING, "Error during refresh", ex);
} finally {
if(System.getSecurityManager() == null) {
currentThread.setContextClassLoader(prevClassLoader);
} else {
java.security.AccessController.doPrivileged(
new java.security.PrivilegedAction() {
public java.lang.Object run() {
currentThread.setContextClassLoader(prevClassLoader);
return null;
}
});
}
}
}
private static class ReadOnlyBeanRefreshHandlerInfo {
public long ejbId;
public ClassLoader loader;
public ReadOnlyBeanRefreshEventHandler handler;
public ReadOnlyBeanRefreshHandlerInfo(long ejbId,
ClassLoader loader, ReadOnlyBeanRefreshEventHandler handler) {
this.ejbId = ejbId;
this.loader = loader;
this.handler = handler;
}
}
}
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