Package org.jgroups.protocols
Class COMPRESS
- java.lang.Object
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- org.jgroups.stack.Protocol
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- org.jgroups.protocols.COMPRESS
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Nested Class Summary
Nested Classes Modifier and Type Class Description static class
COMPRESS.CompressHeader
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Field Summary
Fields Modifier and Type Field Description protected int
compression_level
protected java.util.concurrent.BlockingQueue<java.util.zip.Deflater>
deflater_pool
protected java.util.concurrent.BlockingQueue<java.util.zip.Inflater>
inflater_pool
protected int
min_size
protected MessageFactory
msg_factory
protected java.util.concurrent.atomic.LongAdder
num_compressions
protected java.util.concurrent.atomic.LongAdder
num_decompressions
protected int
pool_size
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Fields inherited from class org.jgroups.stack.Protocol
after_creation_hook, down_prot, ergonomics, id, local_addr, log, policies, stack, stats, up_prot
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Constructor Summary
Constructors Constructor Description COMPRESS()
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description void
destroy()
This method is called on aJChannel.close()
.java.lang.Object
down(Message msg)
We compress the payload if it is larger thanmin_size
.int
getMinSize()
long
getNumCompressions()
long
getNumUncompressions()
void
init()
Called after a protocol has been created and before the protocol is started.protected static Message
messageFromByteArray(byte[] uncompressed_payload, MessageFactory msg_factory)
protected static ByteArray
messageToByteArray(Message msg)
void
resetStats()
COMPRESS
setMinSize(int s)
protected Message
uncompress(Message msg, int original_size, boolean needs_deserialization)
Returns a new message as a result of uncompressing msg, or null if msg couldn't be uncompressedjava.lang.Object
up(Message msg)
If there is no header, we pass the message up.void
up(MessageBatch batch)
Sends up a multiple messages in aMessageBatch
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Methods inherited from class org.jgroups.stack.Protocol
accept, addPolicy, addr, addr, afterCreationHook, down, down, enableStats, getAddress, getComponents, getDownProtocol, getDownServices, getId, getIdsAbove, getLevel, getLog, getName, getPolicies, getProtocolStack, getSocketFactory, getThreadFactory, getTransport, getUpProtocol, getUpServices, getValue, isErgonomics, level, parse, policies, providedDownServices, providedUpServices, removePolicy, requiredDownServices, requiredUpServices, resetStatistics, setAddress, setDownProtocol, setErgonomics, setId, setLevel, setPolicies, setProtocolStack, setSocketFactory, setUpProtocol, setValue, start, statsEnabled, stop, toString, up
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Field Detail
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compression_level
protected int compression_level
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min_size
protected int min_size
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pool_size
protected int pool_size
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deflater_pool
protected java.util.concurrent.BlockingQueue<java.util.zip.Deflater> deflater_pool
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inflater_pool
protected java.util.concurrent.BlockingQueue<java.util.zip.Inflater> inflater_pool
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msg_factory
protected MessageFactory msg_factory
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num_compressions
protected final java.util.concurrent.atomic.LongAdder num_compressions
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num_decompressions
protected final java.util.concurrent.atomic.LongAdder num_decompressions
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Method Detail
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getMinSize
public int getMinSize()
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setMinSize
public COMPRESS setMinSize(int s)
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getNumCompressions
public long getNumCompressions()
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getNumUncompressions
public long getNumUncompressions()
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resetStats
public void resetStats()
- Overrides:
resetStats
in classProtocol
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init
public void init() throws java.lang.Exception
Description copied from class:Protocol
Called after a protocol has been created and before the protocol is started. Attributes are already set. Other protocols are not yet connected and events cannot yet be sent.
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destroy
public void destroy()
Description copied from class:Protocol
This method is called on aJChannel.close()
. Does some cleanup; after the call, the VM will terminate
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down
public java.lang.Object down(Message msg)
We compress the payload if it is larger thanmin_size
. In this case we add a header containing the original size before compression. Otherwise we add no header.Note that we compress either the entire buffer (if offset/length are not used), or a subset (if offset/length are used)
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up
public java.lang.Object up(Message msg)
If there is no header, we pass the message up. Otherwise we uncompress the payload to its original size.
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up
public void up(MessageBatch batch)
Description copied from class:Protocol
Sends up a multiple messages in aMessageBatch
. The sender of the batch is always the same, and so is the destination (null == multicast messages). Messages in a batch can be OOB messages, regular messages, or mixed messages, although the transport itself will create initial MessageBatches that contain only either OOB or regular messages. The default processing below sends messages up the stack individually, based on a matching criteria (callingProtocol.accept(Message)
), and - if true - callsProtocol.up(org.jgroups.Event)
for that message and removes the message. If the batch is not empty, it is passed up, or else it is dropped. Subclasses should check if there are any messages destined for them (e.g. usingMessageBatch.iterator(Predicate)
), then possibly remove and process them and finally pass the batch up to the next protocol. Protocols can also modify messages in place, e.g. ENCRYPT could decrypt all encrypted messages in the batch, not remove them, and pass the batch up when done.
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uncompress
protected Message uncompress(Message msg, int original_size, boolean needs_deserialization)
Returns a new message as a result of uncompressing msg, or null if msg couldn't be uncompressed
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messageFromByteArray
protected static Message messageFromByteArray(byte[] uncompressed_payload, MessageFactory msg_factory)
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