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javax.jms Interface ObjectMessage
- All Superinterfaces:
- Message
public interface ObjectMessage
- extends Message
ObjectMessage
对象用于发送包含 Java 编程语言中可序列化对象(“Java 对象”)的消息。它继承自 Message
接口并添加了包含一个对某对象引用的正文。只能使用 Serializable
Java 对象。
如果必须发送 Java 对象的集合,则可以使用自 JDK 1.2 起提供的 Collection
类之一。
当客户端接收 ObjectMessage
时,它是只读模式。如果客户端尝试在此时写入消息,则抛出 MessageNotWriteableException
。如果调用了 clearBody
,现在便可以读取和写入消息。
version |
| |
See also | createObjectMessage(), createObjectMessage(Serializable), javax.jms.BytesMessage, javax.jms.MapMessage, javax.jms.Message, javax.jms.StreamMessage, javax.jms.TextMessage |
An ObjectMessage
object is used to send a message that contains
a serializable object in the Java programming language ("Java object").
It inherits from the Message
interface and adds a body
containing a single reference to an object. Only Serializable
Java objects can be used.
If a collection of Java objects must be sent, one of the
Collection
classes provided since JDK 1.2 can be used.
When a client receives an ObjectMessage
, it is in read-only
mode. If a client attempts to write to the message at this point, a
MessageNotWriteableException
is thrown. If
clearBody
is called, the message can now be both read from and
written to.
- Version:
- 1.0 - 6 August 1998
- Author:
- Mark Hapner, Rich Burridge
- See Also:
Session.createObjectMessage()
,Session.createObjectMessage(Serializable)
,BytesMessage
,MapMessage
,Message
,StreamMessage
,TextMessage
Field Summary |
---|
Fields inherited from interface javax.jms.Message |
---|
DEFAULT_DELIVERY_MODE, DEFAULT_PRIORITY, DEFAULT_TIME_TO_LIVE |
Method Summary | |
---|---|
Serializable |
getObject()
Gets the serializable object containing this message's data. |
void |
setObject(Serializable object)
Sets the serializable object containing this message's data. |
Method Detail |
---|
public void
setObject(java.io.Serializable object) throws JMSException
设置包含此消息数据的可序列化对象。要特别注意的是,调用 setObject()
时,ObjectMessage
包含的是对象的快照;后续对对象的修改不会影响 ObjectMessage
正文。
object | 消息的数据 |
Throws | JMSException: 如果 JMS 提供者由于某个内部错误无法设置对象。 |
Throws | MessageFormatException: 如果对象序列化失败。 |
Throws | MessageNotWriteableException: 如果消息是只读模式。 |
setObject
void setObject(Serializable object) throws JMSException
- Sets the serializable object containing this message's data.
It is important to note that an
ObjectMessage
contains a snapshot of the object at the timesetObject()
is called; subsequent modifications of the object will have no effect on theObjectMessage
body. - Parameters:
object
- the message's data- Throws:
JMSException
- if the JMS provider fails to set the object due to some internal error.MessageFormatException
- if object serialization fails.MessageNotWriteableException
- if the message is in read-only mode.
public java.io.Serializable
getObject() throws JMSException
获取包含此消息数据的可序列化对象。默认值为 null。
return | 包含此消息数据的可序列化对象。 |
Throws | JMSException: 如果 JMS 提供者由于某个内部错误无法获取对象。 |
Throws | MessageFormatException: 如果对象反序列化失败。 |
getObject
Serializable getObject() throws JMSException
- Gets the serializable object containing this message's data. The
default value is null.
- Returns:
- the serializable object containing this message's data
- Throws:
JMSException
- if the JMS provider fails to get the object due to some internal error.MessageFormatException
- if object deserialization fails.
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