com.perforce.p4java.impl.mapbased.rpc.stream
Class RpcStreamConnection

java.lang.Object
  com.perforce.p4java.impl.mapbased.rpc.connection.RpcConnection
      com.perforce.p4java.impl.mapbased.rpc.stream.RpcStreamConnection

public class RpcStreamConnection
extends RpcConnection

Socket stream I/O based implementation of the RpcConnection class.

The implementation here uses a small stack of input and output streams based on socket streams at the lowest level, with (at least) an optional connection compression stream on top of that layer, and with charset conversion where necessary.

Field Summary

protected static int	INITIAL_SENDBUF_SIZE Number of bytes we allocate for initial byte arrays for sending RPC packets.
protected static int	SENDBUF_REALLOC_INCR When we run out of send buffer space in putPacket, we allocate another, larger, buffer; this constant determines how much larger than the existing buffer the new one should be, or, alternatively, how much bigger than the incoming field length the new buffer should be.
static String	TRACE_PREFIX

Fields inherited from class com.perforce.p4java.impl.mapbased.rpc.connection.RpcConnection

clientCharset, flowController, hostName, hostPort, isUnicodeServer, NON_UNICODE_SERVER_CHARSET, NON_UNICODE_SERVER_CHARSET_NAME, props, stats, UNICODE_SERVER_CHARSET, UNICODE_SERVER_CHARSET_NAME, usingCompression

Constructor Summary

RpcStreamConnection(String serverHost, int serverPort, Properties props, ServerStats stats, Charset charset)
Construct a new Perforce RPC connection to the named Perforce server using java.io socket streams at the lowest level.

RpcStreamConnection(String serverHost, int serverPort, Properties props, ServerStats stats, Charset charset, RpcSocketPool pool)
Construct a new Perforce RPC connection to the named Perforce server using java.io socket streams at the lowest level.

RpcStreamConnection(String serverHost, int serverPort, Properties props, ServerStats stats, Charset charset, Socket socket)
Construct a new Perforce RPC connection to the named Perforce server using java.io socket streams at the lowest level.

Method Summary

void	disconnect(RpcPacketDispatcher dispatcher) Disconnect this server.
RpcPacket	getRpcPacket() Get a Perforce RPC packet from the underlying stream.
int	getSystemRecvBufferSize() Return the system (i.e.
int	getSystemSendBufferSize() Return the system (i.e.
long	putRpcPacket(RpcPacket packet) Put a Perforce RPC packet onto the output stream.
long	putRpcPackets(RpcPacket[] packets) Put an array of RPC packets.
void	useConnectionCompression() If called, will set this connection to use (GZIP) compression for all traffic on this connection from this point on.

Methods inherited from class com.perforce.p4java.impl.mapbased.rpc.connection.RpcConnection

getClientCharset, getFlowController, getHostName, getHostPort, getNormalizedBytes, getNormalizedString, getProps, getStats, isUnicodeServer, isUsingCompression, marshalPacketField, marshalPacketValue, setClientCharset, setFlowController, setHostName, setHostPort, setProps, setStats, setUnicodeServer, setUsingCompression

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

TRACE_PREFIX

public static final String TRACE_PREFIX

See Also:

Constant Field Values

INITIAL_SENDBUF_SIZE

protected static final int INITIAL_SENDBUF_SIZE

Number of bytes we allocate for initial byte arrays for sending RPC packets. In general we don't know how big the final buffer is, so this figure is a bit of a guessed compromise between over-allocation and frequent resizing.

See Also:

Constant Field Values

SENDBUF_REALLOC_INCR

protected static final int SENDBUF_REALLOC_INCR

When we run out of send buffer space in putPacket, we allocate another, larger, buffer; this constant determines how much larger than the existing buffer the new one should be, or, alternatively, how much bigger than the incoming field length the new buffer should be. Should probably be more tunable...

See Also:

Constant Field Values

Constructor Detail

RpcStreamConnection

public RpcStreamConnection(String serverHost,
                           int serverPort,
                           Properties props,
                           ServerStats stats,
                           Charset charset)
                    throws ConnectionException

Construct a new Perforce RPC connection to the named Perforce server using java.io socket streams at the lowest level. This constructor sets up the default non-compressed stack; in general this means just a couple of simple socket streams.

Parameters:

serverHost -

serverPort -

props -

stats -

charset -

Throws:

ConnectionException

RpcStreamConnection

public RpcStreamConnection(String serverHost,
                           int serverPort,
                           Properties props,
                           ServerStats stats,
                           Charset charset,
                           Socket socket)
                    throws ConnectionException

Construct a new Perforce RPC connection to the named Perforce server using java.io socket streams at the lowest level. This constructor sets up the default non-compressed stack; in general this means just a couple of simple socket streams.

Parameters:

serverHost -

serverPort -

props -

stats -

charset -

socket -

Throws:

ConnectionException

RpcStreamConnection

public RpcStreamConnection(String serverHost,
                           int serverPort,
                           Properties props,
                           ServerStats stats,
                           Charset charset,
                           RpcSocketPool pool)
                    throws ConnectionException

Construct a new Perforce RPC connection to the named Perforce server using java.io socket streams at the lowest level. This constructor sets up the default non-compressed stack; in general this means just a couple of simple socket streams.

Parameters:

serverHost -

serverPort -

props -

stats -

charset -

pool -

Throws:

ConnectionException

Method Detail

disconnect

public void disconnect(RpcPacketDispatcher dispatcher)
                throws ConnectionException

Description copied from class: RpcConnection

Disconnect this server. Assumes the connection is quiescent -- no further sends or receives will be possible after this call, and only the output stream is flushed (no attempt is made to look at anything still on the wire coming in to the socket).

Specified by:

disconnect in class RpcConnection

Throws:

ConnectionException

See Also:

com.perforce.p4java.impl.mapbased.rpc.connection.RpcConnection#disconnect()

useConnectionCompression

public void useConnectionCompression()
                              throws ConnectionException

Description copied from class: RpcConnection

If called, will set this connection to use (GZIP) compression for all traffic on this connection from this point on. Can not be turned back off again. See the main P4 help documentation (and C++ API code) for "client compression" (etc.) for details.

Overrides:

useConnectionCompression in class RpcConnection

Throws:

ConnectionException

See Also:

RpcConnection.useConnectionCompression()

getRpcPacket

public RpcPacket getRpcPacket()
                       throws ConnectionException

Get a Perforce RPC packet from the underlying stream. If we're talking to a Unicode-enabled Perforce server, we attempt to translate the incoming bytes to the relevant client-side charsets where appropriate based on packet field type, etc.

Specified by:

getRpcPacket in class RpcConnection

Throws:

ConnectionException

putRpcPacket

public long putRpcPacket(RpcPacket packet)
                  throws ConnectionException

Put a Perforce RPC packet onto the output stream. In some cases this may require considerable processing and things like charset translation here and downstream, but it's normally fairly straightforward.

Specified by:

putRpcPacket in class RpcConnection

Throws:

ConnectionException

putRpcPackets

public long putRpcPackets(RpcPacket[] packets)
                   throws ConnectionException

Description copied from class: RpcConnection

Put an array of RPC packets. A convenience method wrapping putRpcPacket(packet) in the obvious way.

Specified by:

putRpcPackets in class RpcConnection

Throws:

ConnectionException

See Also:

RpcConnection.putRpcPackets(com.perforce.p4java.impl.mapbased.rpc.packet.RpcPacket[])

getSystemSendBufferSize

public int getSystemSendBufferSize()

Description copied from class: RpcConnection

Return the system (i.e. underlying implementation) send buffer size.

Specified by:

getSystemSendBufferSize in class RpcConnection

See Also:

RpcConnection.getSystemSendBufferSize()

getSystemRecvBufferSize

public int getSystemRecvBufferSize()

Description copied from class: RpcConnection

Return the system (i.e. underlying implementation) receive buffer size.

Specified by:

getSystemRecvBufferSize in class RpcConnection

See Also:

RpcConnection.getSystemRecvBufferSize()