Package com.ericsson.otp.erlang

Class OtpErlangPid

java.lang.Object

com.ericsson.otp.erlang.OtpErlangObject

com.ericsson.otp.erlang.OtpErlangPid

All Implemented Interfaces:

Serializable, Cloneable, Comparable<Object>

public class OtpErlangPid
extends OtpErlangObject
implements Comparable<Object>

Provides a Java representation of Erlang PIDs. PIDs represent Erlang processes and consist of a nodename and a number of integers.

See Also:

• Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class com.ericsson.otp.erlang.OtpErlangObject

OtpErlangObject.Hash

Field Summary

Fields inherited from class com.ericsson.otp.erlang.OtpErlangObject

hashCodeValue

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	OtpErlangPid(int tag, String node, int id, int serial, int creation)	Create an Erlang pid from its components.
	OtpErlangPid(OtpInputStream buf)	Create an Erlang PID from a stream containing a PID encoded in Erlang external format.
	OtpErlangPid(OtpLocalNode self)	Deprecated. use OtpLocalNode:createPid() instead
	OtpErlangPid(String node, int id, int serial, int creation)	Create an Erlang pid from its components.

Method Summary

Modifier and Type	Method	Description
int	compareTo(Object o)
int	creation()	Get the creation number from the PID.
protected int	doHashCode()
void	encode(OtpOutputStream buf)	Convert this PID to the equivalent Erlang external representation.
boolean	equals(Object o)	Determine if two PIDs are equal.
int	id()	Get the id number from the PID.
String	node()	Get the node name from the PID.
int	serial()	Get the serial number from the PID.
protected int	tag()
String	toString()	Get the string representation of the PID.

Methods inherited from class com.ericsson.otp.erlang.OtpErlangObject

bind, clone, decode, hashCode, match

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Details

OtpErlangPid

@Deprecated
public OtpErlangPid(OtpLocalNode self)

Deprecated.

use OtpLocalNode:createPid() instead

Create a unique Erlang PID belonging to the local node.

Parameters:

self - the local node.

OtpErlangPid

public OtpErlangPid(OtpInputStream buf)
             throws OtpErlangDecodeException

Create an Erlang PID from a stream containing a PID encoded in Erlang external format.

Parameters:

buf - the stream containing the encoded PID.

Throws:

OtpErlangDecodeException - if the buffer does not contain a valid external representation of an Erlang PID.

OtpErlangPid

public OtpErlangPid(String node,
 int id,
 int serial,
 int creation)

Create an Erlang pid from its components.

Parameters:

node - the nodename.

id - an arbitrary number. Only the low order 15 bits will be used.

serial - another arbitrary number. Only the low order 13 bits will be used.

creation - node incarnation number. Avoid values 0 to 3.

OtpErlangPid

protected OtpErlangPid(int tag,
 String node,
 int id,
 int serial,
 int creation)

Create an Erlang pid from its components.

Parameters:

tag - the external format to be compliant with OtpExternal.pidTag where only a subset of the bits are significant (see other constructor). OtpExternal.newPidTag where all 32 bits of id,serial and creation are significant. newPidTag can only be decoded by OTP-19 and newer.

node - the nodename.

id - an arbitrary number.

serial - another arbitrary number.

creation - yet another arbitrary number.

Method Details

tag

protected int tag()

serial

public int serial()

Get the serial number from the PID.

Returns:

the serial number from the PID.

id

public int id()

Get the id number from the PID.

Returns:

the id number from the PID.

creation

public int creation()

Get the creation number from the PID.

Returns:

the creation number from the PID.

node

public String node()

Get the node name from the PID.

Returns:

the node name from the PID.

toString

public String toString()

Get the string representation of the PID. Erlang PIDs are printed as #Pid<node.id.serial>

Specified by:

toString in class OtpErlangObject

Returns:

the string representation of the PID.

encode

public void encode(OtpOutputStream buf)

Convert this PID to the equivalent Erlang external representation.

Specified by:

encode in class OtpErlangObject

Parameters:

buf - an output stream to which the encoded PID should be written.

equals

public boolean equals(Object o)

Determine if two PIDs are equal. PIDs are equal if their components are equal.

Specified by:

equals in class OtpErlangObject

Parameters:

o - the other PID to compare to.

Returns:

true if the PIDs are equal, false otherwise.

doHashCode

protected int doHashCode()

Overrides:

doHashCode in class OtpErlangObject

compareTo

public int compareTo(Object o)

Specified by:

compareTo in interface Comparable<Object>