Package org.jgroups.blocks
Class RequestCorrelator.Header
java.lang.Object
org.jgroups.Header
org.jgroups.blocks.RequestCorrelator.Header
- All Implemented Interfaces:
Externalizable
,Serializable
,Streamable
- Enclosing class:
RequestCorrelator
The header for RequestCorrelator messages
- See Also:
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Field Summary
FieldsModifier and TypeFieldDescriptionStack<Address>.The unique name of the associated RequestCorrelatorContains a list of members who should receive the request (others will drop).long
The id of this request to distinguish among other requests from the same RequestCorrelatorstatic final byte
static final byte
boolean
msg is synchronous if truebyte
Type of header: request or replyFields inherited from class org.jgroups.Header
HDR_OVERHEAD
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionvoid
void
Read the state of the current object (including superclasses) from instream Note that the input stream must not be closedint
size()
To be implemented by subclasses.toString()
void
void
writeTo
(DataOutputStream out) Write the entire state of the current object (including superclasses) to outstream.
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Field Details
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REQ
public static final byte REQ- See Also:
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RSP
public static final byte RSP- See Also:
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type
public byte typeType of header: request or reply -
id
public long idThe id of this request to distinguish among other requests from the same RequestCorrelator -
rsp_expected
public boolean rsp_expectedmsg is synchronous if true -
corrName
The unique name of the associated RequestCorrelator -
callStack
Stack<Address>. Contains senders (e.g. P --> Q --> R) -
dest_mbrs
Contains a list of members who should receive the request (others will drop). Ignored if null
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Constructor Details
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Header
public Header()Used for externalization -
Header
- Parameters:
type
- type of header (REQ/RSP)id
- id of this header relative to ids of other requests originating from the same correlatorrsp_expected
- whether it's a sync or async requestname
- the name of the RequestCorrelator from which
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Method Details
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toString
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writeExternal
- Specified by:
writeExternal
in interfaceExternalizable
- Throws:
IOException
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readExternal
- Specified by:
readExternal
in interfaceExternalizable
- Throws:
IOException
ClassNotFoundException
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writeTo
Description copied from interface:Streamable
Write the entire state of the current object (including superclasses) to outstream. Note that the output stream must not be closed- Specified by:
writeTo
in interfaceStreamable
- Throws:
IOException
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readFrom
public void readFrom(DataInputStream in) throws IOException, IllegalAccessException, InstantiationException Description copied from interface:Streamable
Read the state of the current object (including superclasses) from instream Note that the input stream must not be closed- Specified by:
readFrom
in interfaceStreamable
- Throws:
IOException
IllegalAccessException
InstantiationException
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size
public int size()Description copied from class:Header
To be implemented by subclasses. Return the size of this object for the serialized version of it. I.e. how many bytes this object takes when flattened into a buffer. This may be different for each instance, or can be the same. This may also just be an estimation. E.g. FRAG uses it on Message to determine whether or not to fragment the message. Fragmentation itself will be accurate, because the entire message will actually be serialized into a byte buffer, so we can determine the exact size.
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