private SimpleMessageGroup buildMessageGroup(Object groupId, boolean raw) {
Assert.notNull(groupId, "'groupId' must not be null");
Object mgm = this.doRetrieve(MESSAGE_GROUP_KEY_PREFIX + groupId);
if (mgm != null) {
Assert.isInstanceOf(MessageGroupMetadata.class, mgm);
MessageGroupMetadata messageGroupMetadata = (MessageGroupMetadata) mgm;
ArrayList<Message<?>> messages = new ArrayList<Message<?>>();
Iterator<UUID> messageIds = messageGroupMetadata.messageIdIterator();
while (messageIds.hasNext()) {
if (raw) {
messages.add(this.getRawMessage(messageIds.next()));
} else {
messages.add(this.getMessage(messageIds.next()));
}
}
SimpleMessageGroup messageGroup =
new SimpleMessageGroup(
messages,
groupId,
messageGroupMetadata.getTimestamp(),
messageGroupMetadata.isComplete());
messageGroup.setLastReleasedMessageSequenceNumber(
messageGroupMetadata.getLastReleasedMessageSequenceNumber());
return messageGroup;
} else {
return new SimpleMessageGroup(groupId);
}
}
/** Remove the MessageGroup with the provided group ID. */
public void removeMessageGroup(Object groupId) {
Assert.notNull(groupId, "'groupId' must not be null");
Object mgm = this.doRemove(MESSAGE_GROUP_KEY_PREFIX + groupId);
if (mgm != null) {
Assert.isInstanceOf(MessageGroupMetadata.class, mgm);
MessageGroupMetadata messageGroupMetadata = (MessageGroupMetadata) mgm;
Iterator<UUID> messageIds = messageGroupMetadata.messageIdIterator();
while (messageIds.hasNext()) {
this.removeMessage(messageIds.next());
}
}
}
public Message<?> pollMessageFromGroup(Object groupId) {
Assert.notNull(groupId, "'groupId' must not be null");
Object mgm = this.doRetrieve(MESSAGE_GROUP_KEY_PREFIX + groupId);
if (mgm != null) {
Assert.isInstanceOf(MessageGroupMetadata.class, mgm);
MessageGroupMetadata messageGroupMetadata = (MessageGroupMetadata) mgm;
UUID firstId = messageGroupMetadata.firstId();
if (firstId != null) {
messageGroupMetadata.remove(firstId);
this.doStore(MESSAGE_GROUP_KEY_PREFIX + groupId, messageGroupMetadata);
return this.removeMessage(firstId);
}
}
return null;
}