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org.jboss.mq.il.uil2.msgs
BaseMsg (JBoss Messaging API) - JBoss 3.2.7 messaging API Documentation 英文版文档
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org.jboss.mq.il.uil2.msgs
Class BaseMsg
java.lang.Objectorg.jboss.mq.il.uil2.msgs.BaseMsg
- All Implemented Interfaces:
- Runnable
- Direct Known Subclasses:
- AcknowledgementRequestMsg, AddMsg, BrowseMsg, CheckIDMsg, CheckUserMsg, CloseMsg, ConnectionTokenMsg, CreateDestMsg, DeleteSubscriptionMsg, DeleteTemporaryDestMsg, EnableConnectionMsg, GetIDMsg, PingMsg, ReceiveMsg, ReceiveRequestMsg, SubscribeMsg, TemporaryDestMsg, TransactMsg, UnsubscribeMsg
The base msg class for all msgs used by the UIL2 invoker. Msgs consist of a msg type, id and exception and can operate as two way items that are sent with the request content and received with the reply content for the request. Such round-trip behavior is based on matching the request msgID with the reply msgID. The msgID parameter is segmented into value 1 to 2147483647 for client originated msgs and -1 to -2147483647 for server originated msgs.
The message is a Runnable to avoid constructing a Runnable object when asynchronously handling the message from the ReadTask.
- Version:
- $Revision: 1.1.4.4 $
- Author:
- Scott.Stark@jboss.org, Adrian.Brock@HappeningTimes.com
| Field Summary | |
Exception |
error
Any error thrown by the remote side |
int |
msgID
A msg id used to associated a reply with its request |
int |
msgType
The MsgTypes constant representing the type of the msg |
| Constructor Summary | |
BaseMsg(int msgType)
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BaseMsg(int msgType,
int msgID)
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| Method Summary | |
static BaseMsg |
createMsg(int msgType)
Create a BaseMsg subclass based on the msgType. |
boolean |
equals(Object o)
Equality is based on BaseMsg.msgID |
Exception |
getError()
Access any exception associated with the msg |
int |
getMsgID()
Access the msgID, initializing it if it has not been set yet. |
int |
getMsgType()
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int |
hashCode()
Hash code is simply the msgID |
void |
read(ObjectInputStream in)
Read the hasError flag and optionally the error. |
void |
run()
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void |
setError(Throwable e)
Set an exception that should be used as the msg return value. |
void |
setHandler(SocketManager.ReadTask handler)
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void |
setMsgID(int msgID)
Set the msgID. |
static void |
setUseJMSServerMsgIDs(boolean flag)
Set the msgID parameter range. |
String |
toString()
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static String |
toString(int msgType)
Translate a msgType into its string menmonic. |
void |
trimReply()
Trim the message when replying |
void |
write(ObjectOutputStream out)
Write the msgType, msgID, hasError flag and optionally the error |
| Methods inherited from class java.lang.Object |
clone, finalize, getClass, notify, notifyAll, wait, wait, wait |
| Field Detail |
msgType
public int msgType
- The MsgTypes constant representing the type of the msg
msgID
public int msgID
- A msg id used to associated a reply with its request
error
public Exception error
- Any error thrown by the remote side
| Constructor Detail |
BaseMsg
public BaseMsg(int msgType)
BaseMsg
public BaseMsg(int msgType,
int msgID)
| Method Detail |
setUseJMSServerMsgIDs
public static void setUseJMSServerMsgIDs(boolean flag)
- Set the msgID parameter range. If false, the msgID is segmented into the
range 1 to 2147483647 and if true, the rangs is -1 to -2147483647. The
JMS server sets this to true and clients default to false.
- Parameters:
flag-
createMsg
public static BaseMsg createMsg(int msgType) throws IllegalArgumentException
- Create a BaseMsg subclass based on the msgType.
- Parameters:
msgType- A MsgTypes.m_xxx constant- Returns:
- the derived BaseMsg
- Throws:
IllegalArgumentException- thrown for a msgType that does not match any MsgTypes.m_xxx constant
toString
public static String toString(int msgType)
- Translate a msgType into its string menmonic.
- Parameters:
msgType- A MsgTypes.m_xxx constant- Returns:
- the string form of the MsgTypes.m_xxx constant
getMsgType
public int getMsgType()
getMsgID
public int getMsgID()
- Access the msgID, initializing it if it has not been set yet. This
is used by the SocketManager.internalSendMessage to setup the unique
msgID for a request msg.
- Returns:
- the msgID value
setMsgID
public void setMsgID(int msgID)
- Set the msgID. This is used by the SocketManager read task to populate
a msg with its request ID.
- Parameters:
msgID- the msgID read off the socket
getError
public Exception getError()
- Access any exception associated with the msg
- Returns:
setError
public void setError(Throwable e)
- Set an exception that should be used as the msg return value.
- Parameters:
e-
equals
public boolean equals(Object o)
- Equality is based on BaseMsg.msgID
- Parameters:
o- a BaseMsg- Returns:
- true if o.msgID == msgID
hashCode
public int hashCode()
- Hash code is simply the msgID
- Returns:
toString
public String toString()
trimReply
public void trimReply()
- Trim the message when replying
write
public void write(ObjectOutputStream out) throws IOException
- Write the msgType, msgID, hasError flag and optionally the error
- Parameters:
out-- Throws:
IOException
read
public void read(ObjectInputStream in) throws IOException, ClassNotFoundException
- Read the hasError flag and optionally the error. This method is not
a complete analog of write because the SocketManager read task reads
the msgType and msgID off of the socket.
- Parameters:
in-- Throws:
IOExceptionClassNotFoundException
setHandler
public void setHandler(SocketManager.ReadTask handler)
run
public void run()
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