AbstractNode

java.lang.Object
- com.ericsson.otp.erlang.AbstractNode

All Implemented Interfaces:

OtpTransportFactory

Direct Known Subclasses:

OtpLocalNode, OtpPeer
```
public class AbstractNode
extends java.lang.Object
implements OtpTransportFactory
```
Represents an OTP node.

About nodenames: Erlang nodenames consist of two components, an alivename and a hostname separated by '@'. Additionally, there are two nodename formats: short and long. Short names are of the form "alive@hostname", while long names are of the form "alive@host.fully.qualified.domainname". Erlang has special requirements regarding the use of the short and long formats, in particular they cannot be mixed freely in a network of communicating nodes, however Jinterface makes no distinction. See the Erlang documentation for more information about nodenames.

The constructors for the AbstractNode classes will create names exactly as you provide them as long as the name contains '@'. If the string you provide contains no '@', it will be treated as an alivename and the name of the local host will be appended, resulting in a shortname. Nodenames longer than 255 characters will be truncated without warning.

Upon initialization, this class attempts to read the file .erlang.cookie in the user's home directory, and uses the trimmed first line of the file as the default cookie by those constructors lacking a cookie argument. If for any reason the file cannot be found or read, the default cookie will be set to the empty string (""). The location of a user's home directory is determined using the system property "user.home", which may not be automatically set on all platforms.

Instances of this class cannot be created directly, use one of the subclasses instead.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`java.lang.String`	`alive()` Get the alivename part of the hostname.
`java.lang.String`	`cookie()` Get the authorization cookie used by this node.
`OtpServerTransport`	`createServerTransport(int port)` Create instance of `OtpServerTransport`
`OtpTransport`	`createTransport(java.net.InetAddress addr, int port)` Create instance of `OtpTransport`
`OtpTransport`	`createTransport(java.lang.String addr, int port)` Create instance of `OtpTransport`
`java.lang.String`	`host()` Get the hostname part of the nodename.
`java.lang.String`	`node()` Get the name of this node.
`java.lang.String`	`setCookie(java.lang.String cookie)` Set the authorization cookie used by this node.
`java.lang.String`	`toString()`

Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

- Method Detail
  - alive
```
public java.lang.String alive()
```
    Get the alivename part of the hostname. Nodenames are composed of two parts, an alivename and a hostname, separated by '@'. This method returns the part of the nodename preceding the '@'.
    
    Returns:
    
    the alivename component of the nodename.
  - cookie
```
public java.lang.String cookie()
```
    Get the authorization cookie used by this node.
    
    Returns:
    
    the authorization cookie used by this node.
  - createServerTransport
```
public OtpServerTransport createServerTransport(int port)
                                         throws java.io.IOException
```
    Description copied from interface: OtpTransportFactory
    
    Create instance of OtpServerTransport
    
    Specified by:
    
    createServerTransport in interface OtpTransportFactory
    
    Parameters:
    
    port - port number to listen on
    
    Returns:
    
    new socket object
    
    Throws:
    
    java.io.IOException
  - createTransport
```
public OtpTransport createTransport(java.net.InetAddress addr,
                                    int port)
                             throws java.io.IOException
```
    Description copied from interface: OtpTransportFactory
    
    Create instance of OtpTransport
    
    Specified by:
    
    createTransport in interface OtpTransportFactory
    
    Parameters:
    
    addr - peer address
    
    port - port number
    
    Returns:
    
    new socket object
    
    Throws:
    
    java.io.IOException
  - createTransport
```
public OtpTransport createTransport(java.lang.String addr,
                                    int port)
                             throws java.io.IOException
```
    Description copied from interface: OtpTransportFactory
    
    Create instance of OtpTransport
    
    Specified by:
    
    createTransport in interface OtpTransportFactory
    
    Parameters:
    
    addr - host name or IP address string
    
    port - port number
    
    Returns:
    
    new socket object
    
    Throws:
    
    java.io.IOException
  - host
```
public java.lang.String host()
```
    Get the hostname part of the nodename. Nodenames are composed of two parts, an alivename and a hostname, separated by '@'. This method returns the part of the nodename following the '@'.
    
    Returns:
    
    the hostname component of the nodename.
  - node
```
public java.lang.String node()
```
    Get the name of this node.
    
    Returns:
    
    the name of the node represented by this object.
  - setCookie
```
public java.lang.String setCookie(java.lang.String cookie)
```
    Set the authorization cookie used by this node.
    
    Returns:
    
    the previous authorization cookie used by this node.
  - toString
```
public java.lang.String toString()
```
    Overrides:
    
    toString in class java.lang.Object

Class AbstractNode

Method Summary

Methods inherited from class java.lang.Object

Method Detail

alive

cookie

createServerTransport

createTransport

createTransport

host

node

setCookie

toString