Package py4j

Interface Summary

Interface	Description
GatewayServerListener	A client can implement this listener to be notified of Gateway events.
Py4JClientConnection
Py4JJavaServer	Interface that describes the operations a server must support to receive requests from the Python side.
Py4JPythonClient	Interface that describes the operations a client must support to make requests to the Python side.
Py4JPythonClientPerThread
Py4JServerConnection

Class Summary

Class	Description
Base64	A very fast and memory efficient class to encode and decode to and from BASE64 in full accordance with RFC 2045. On Windows XP sp1 with 1.4.2_04 and later ;), this encoder and decoder is about 10 times faster on small arrays (10 - 1000 bytes) and 2-3 times as fast on larger arrays (10000 - 1000000 bytes) compared to sun.misc.Encoder()/Decoder(). On byte arrays the encoder is about 20% faster than Jakarta Commons Base64 Codec for encode and about 50% faster for decoding large arrays.
CallbackClient	A CallbackClient is responsible for managing communication channels: channels are created as needed (e.g., one per concurrent thread) and are closed after a certain time.
CallbackConnection	Default implementation of the CommunicationChannel interface using TCP sockets.
ClientServer	This class creates the JavaServer and the PythonClient necessary to communicate with a Python virtual machine with the new threading model.
ClientServer.ClientServerBuilder	Helper class to make it easier and self-documenting how a ClientServer is constructed.
ClientServerConnection
DefaultApplication	Default application that can be used to quickly test Py4J.
DefaultGatewayServerListener	This class implements a default GatewayServerListener.
Gateway	A Gateway manages various states: entryPoint, references to objects returned to a Python program, etc.
GatewayConnection	Manage the connection between a Python program and a Gateway.
GatewayServer	This class enables Python programs to access a Java program.
GatewayServer.GatewayServerBuilder	Helper class to make it easier and self-documenting how a GatewayServer is constructed.
JavaServer	This class extends GatewayServer by implementing a new threading model: a thread always use the same connection to the other side so callbacks are executed in the calling thread.
JVMView	A JVM view keeps track of imports and import searches.
NetworkUtil	Utility class used to perform network operations.
Protocol	This class defines the protocol used to communicate between two virtual machines (e.g., Python and Java).
PythonClient	Subclass of CallbackClient that implements the new threading model, ensuring that each thread uses its own connection.
ReturnObject	A ReturnObject wraps a value returned by a method.
StringUtil	String utility class providing operations to escape and unescape new lines.

Enum Summary

Enum	Description
Py4JNetworkException.ErrorTime

Exception Summary

Exception	Description
Py4JAuthenticationException
Py4JException	Exception raised when an error is encountered while using Py4J.
Py4JJavaException	Exception raised when an exception is thrown in the client code.
Py4JNetworkException	Exception raised when a network error is encountered while using Py4J.