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See:
Description
Class Summary | |
AbstractConnection | Maintains a connection between a Java process and a remote Erlang, Java or C node. |
AbstractNode | Represents an OTP node. |
GenericQueue | This class implements a generic FIFO queue. |
OtpConnection | Maintains a connection between a Java process and a remote Erlang, Java or C node. |
OtpCookedConnection | Maintains a connection between a Java process and a remote Erlang, Java or C node. |
OtpEpmd | Provides methods for registering, unregistering and looking up nodes with the Erlang portmapper daemon (Epmd). |
OtpErlangAtom | Provides a Java representation of Erlang atoms. |
OtpErlangBinary | Provides a Java representation of Erlang binaries. |
OtpErlangBoolean | Provides a Java representation of Erlang booleans, which are special cases of atoms with values 'true' and 'false'. |
OtpErlangByte | Provides a Java representation of Erlang integral types. |
OtpErlangChar | Provides a Java representation of Erlang integral types. |
OtpErlangDouble | Provides a Java representation of Erlang floats and doubles. |
OtpErlangFloat | Provides a Java representation of Erlang floats and doubles. |
OtpErlangInt | Provides a Java representation of Erlang integral types. |
OtpErlangList | Provides a Java representation of Erlang lists. |
OtpErlangLong | Provides a Java representation of Erlang integral types. |
OtpErlangObject | Base class of the Erlang data type classes. |
OtpErlangPid | Provides a Java representation of Erlang PIDs. |
OtpErlangPort | Provides a Java representation of Erlang ports. |
OtpErlangRef | Provides a Java representation of Erlang refs. |
OtpErlangShort | Provides a Java representation of Erlang integral types. |
OtpErlangString | Provides a Java representation of Erlang strings. |
OtpErlangTuple | Provides a Java representation of Erlang tuples. |
OtpErlangUInt | Provides a Java representation of Erlang integral types. |
OtpErlangUShort | Provides a Java representation of Erlang integral types. |
OtpExternal | Provides a collection of constants used when encoding and decoding Erlang terms. |
OtpInputStream | Provides a stream for decoding Erlang terms from external format. |
OtpLocalNode | This class represents local node types. |
OtpMbox | Provides a simple mechanism for exchanging messages with Erlang processes or other instances of this class. |
OtpMsg | Provides a carrier for Erlang messages. |
OtpNode | Represents a local OTP node. |
OtpNodeStatus | Provides a callback mechanism for receiving status change information about other nodes in the system. |
OtpOutputStream | Provides a stream for encoding Erlang terms to external format, for transmission or storage. |
OtpPeer | Represents a remote OTP node. |
OtpSelf | Represents an OTP node. |
OtpServer | Deprecated. the functionality of this class has been moved to OtpSelf . |
Exception Summary | |
OtpAuthException | Exception raised when a node attempts to establish a communication channel when it is not authorized to do so, or when a node sends a message containing an invalid cookie on an established channel. |
OtpErlangDecodeException | Exception raised when an attempt is made to create an Erlang term by decoding a sequence of bytes that does not represent the type of term that was requested. |
OtpErlangException | Base class for the other OTP erlang exception classes. |
OtpErlangExit | Exception raised when a communication channel is broken. |
OtpErlangRangeException | Exception raised when an attempt is made to create an Erlang term with data that is out of range for the term in question. |
OtpException | Base class for the other OTP exception classes. |
This package provides support for communication with Erlang and representation of Erlang datatypes.
The classes OtpPeer
, OtpSelf
and OtpServer
are used to represent OTP nodes and
are neccessary in order to set up communication between the Java
thread and a remote node. Once a connection has been established, it
is represented by an OtpConnection
,
through which all communication goes.
The classes
OtpErlangList
,
OtpErlangTuple
,
OtpErlangBinary
,
OtpErlangAtom
,
OtpErlangBoolean
,
OtpErlangByte
,
OtpErlangChar
,
OtpErlangDouble
,
OtpErlangFloat
,
OtpErlangLong
,
OtpErlangInt
,
OtpErlangUInt
,
OtpErlangShort
,
OtpErlangUShort
,
OtpErlangString
,
OtpErlangObject
,
OtpErlangPid
,
OtpErlangPort
,
and OtpErlangRef
represent the various Erlang datatypes.
Setting up a connection with a remote node is straightforward. You
create objects representing the local and remote nodes, then call the
local node's connect()
method:
OtpSelf self = new OtpSelf("client","cookie"); OtpPeer other = new OtpPeer("server"); OtpConnection conn = self.connect(other);
The OtpSelf
used in the
previous example is a client-only node, i.e. it can make outgoing
connections but it cannot accept incoming ones. If your Java node also
needs to be able to accept incoming connections, you must use an
OtpServer
instead, which can
do both:
OtpServer self = new OtpServer("client","cookie"); self.publishPort(); OtpConnection conn = self.accept();
Once the connection is established by one of the above methods (connect()
or accept()
), you can use the resulting OtpConnection
to send and
receive messages:
OtpErlangAtom msg = new ErlangOtpAtom("hello"); conn.send("echoserver", msg); OtpErlangObject reply = conn.receive(); System.out.println("Received " + reply);
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