public final class WriteOnlyKeyCommand<K,V> extends AbstractWriteKeyCommand<K,V>
Modifier and Type | Field and Description |
---|---|
static byte |
COMMAND_ID |
commandInvocationId
key
flags
Constructor and Description |
---|
WriteOnlyKeyCommand() |
WriteOnlyKeyCommand(K key,
Consumer<EntryView.WriteEntryView<V>> f,
CommandInvocationId id,
ValueMatcher valueMatcher,
Params params) |
Modifier and Type | Method and Description |
---|---|
Object |
acceptVisitor(InvocationContext ctx,
Visitor visitor)
Accept a visitor, and return the result of accepting this visitor.
|
boolean |
alwaysReadsExistingValues() |
byte |
getCommandId()
Used by marshallers to convert this command into an id for streaming.
|
boolean |
isConditional()
Certain commands only work based on a certain condition or state of the cache.
|
boolean |
isWriteOnly()
Indicates whether the command is write-only, meaning that it makes no
attempt to read the previously associated value with key for which the
command is directed.
|
Object |
perform(InvocationContext ctx)
Performs the primary function of the command.
|
void |
readFrom(ObjectInput input)
Reads this instance from the stream written by
ReplicableCommand.writeTo(ObjectOutput) . |
boolean |
readsExistingValues() |
void |
updateStatusFromRemoteResponse(Object remoteResponse)
Used for conditional commands, to update the status of the command on the originator
based on the result of its execution on the primary owner.
|
void |
writeTo(ObjectOutput output)
Writes this instance to the
ObjectOutput . |
getParams, getValueMatcher, isSuccessful, setValueMatcher
canBlock, getAffectedKeys, getKeyLockOwner, getKeysToLock, hasSkipLocking, hasZeroLockAcquisition, isReturnValueExpected
equals, getKey, hashCode, ignoreCommandOnStatus, setKey, shouldInvoke, toString
getMetadata, getTopologyId, setMetadata, setTopologyId
getFlags, setFlags
clone, finalize, getClass, notify, notifyAll, wait, wait, wait
ignoreCommandOnStatus, shouldInvoke
getTopologyId, setTopologyId
getParameters, setParameters
getMetadata, setMetadata
addFlag, addFlags, getFlags, hasFlag, setFlags, setFlags
getKey
public static final byte COMMAND_ID
public WriteOnlyKeyCommand(K key, Consumer<EntryView.WriteEntryView<V>> f, CommandInvocationId id, ValueMatcher valueMatcher, Params params)
public WriteOnlyKeyCommand()
public byte getCommandId()
ReplicableCommand
public void writeTo(ObjectOutput output) throws IOException
ReplicableCommand
ObjectOutput
.output
- the stream.IOException
- if an error occurred during the I/O.public void readFrom(ObjectInput input) throws IOException, ClassNotFoundException
ReplicableCommand
ReplicableCommand.writeTo(ObjectOutput)
.input
- the stream to read.IOException
- if an error occurred during the I/O.ClassNotFoundException
- if it tries to load an undefined class.public boolean isConditional()
WriteCommand
ConcurrentMap.putIfAbsent(Object, Object)
only does anything if a condition is met, i.e., the entry in
question is not already present. This method tests whether the command in question is conditional or not.public Object acceptVisitor(InvocationContext ctx, Visitor visitor) throws Throwable
VisitableCommand
ctx
- invocation contextvisitor
- visitor to acceptThrowable
- in the event of problemspublic boolean readsExistingValues()
true
if the command needs to read the previous values of the keys it acts on.public boolean alwaysReadsExistingValues()
true
if the command needs to read the previous values even on the backup owners.
In transactional caches, this refers to all the owners except the originator.public Object perform(InvocationContext ctx) throws Throwable
ReplicableCommand
ctx
- invocation contextThrowable
- in the event of problems.public void updateStatusFromRemoteResponse(Object remoteResponse)
WriteCommand
public boolean isWriteOnly()
WriteCommand
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