protected synchronized void expireOldMessages() {
if (!memoryList.isEmpty()) {
for (Iterator<MessageReference> iterator = memoryList.iterator(); iterator.hasNext(); ) {
MessageReference node = iterator.next();
if (node.isExpired()) {
node.decrementReferenceCount();
discardExpiredMessage(node);
iterator.remove();
}
}
}
}
@Override
public synchronized boolean tryAddMessageLast(MessageReference node, long maxWaitTime)
throws Exception {
if (!node.isExpired()) {
try {
regionDestination = (Destination) node.getMessage().getRegionDestination();
if (isDiskListEmpty()) {
if (hasSpace() || this.store == null) {
memoryList.addMessageLast(node);
node.incrementReferenceCount();
setCacheEnabled(true);
return true;
}
}
if (!hasSpace()) {
if (isDiskListEmpty()) {
expireOldMessages();
if (hasSpace()) {
memoryList.addMessageLast(node);
node.incrementReferenceCount();
return true;
} else {
flushToDisk();
}
}
}
if (systemUsage.getTempUsage().waitForSpace(maxWaitTime)) {
ByteSequence bs = getByteSequence(node.getMessage());
getDiskList().addLast(node.getMessageId().toString(), bs);
return true;
}
return false;
} catch (Exception e) {
LOG.error(
"Caught an Exception adding a message: {} first to FilePendingMessageCursor ", node, e);
throw new RuntimeException(e);
}
} else {
discardExpiredMessage(node);
}
// message expired
return true;
}
/**
* add message to await dispatch
*
* @param node
*/
@Override
public synchronized void addMessageFirst(MessageReference node) {
if (!node.isExpired()) {
try {
regionDestination = (Destination) node.getMessage().getRegionDestination();
if (isDiskListEmpty()) {
if (hasSpace()) {
memoryList.addMessageFirst(node);
node.incrementReferenceCount();
setCacheEnabled(true);
return;
}
}
if (!hasSpace()) {
if (isDiskListEmpty()) {
expireOldMessages();
if (hasSpace()) {
memoryList.addMessageFirst(node);
node.incrementReferenceCount();
return;
} else {
flushToDisk();
}
}
}
systemUsage.getTempUsage().waitForSpace();
node.decrementReferenceCount();
ByteSequence bs = getByteSequence(node.getMessage());
Object locator = getDiskList().addFirst(node.getMessageId().toString(), bs);
node.getMessageId().setPlistLocator(locator);
} catch (Exception e) {
LOG.error(
"Caught an Exception adding a message: {} first to FilePendingMessageCursor ", node, e);
throw new RuntimeException(e);
}
} else {
discardExpiredMessage(node);
}
}