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rmid - The Java RMI Activation System Daemon

rmid starts the activation system daemon that allows objects to be registered and activated in a Java virtual machine (JVM).

SYNOPSIS

rmid [options]

DESCRIPTION

The rmid tool starts the activation system daemon. The activation system daemon must be started before activatable objects can be either registered with the activation system or activated in a JVM. See the RMI Specification and Activation tutorials for details on how to write programs that use activatable remote objects.

The daemon can be started by executing the rmid command, and specifying a security policy file, as follows:

    rmid -J-Djava.security.policy=rmid.policy

Note: When running Sun's implementation of rmid, by default you will need to specify a security policy file so that rmid can verify whether or not the information in each ActivationGroupDesc is allowed to be used to launch a JVM for an activation group. Specifically, the command and options specified by the CommandEnvironment and any Properties passed to an ActivationGroupDesc's constructor must now be explicitly allowed in the security policy file for rmid. The value of the sun.rmi.activation.execPolicy property dictates the policy that rmid uses to determine whether or not the information in an ActivationGroupDesc may be used to launch a JVM for an activation group.

Executing rmid by default

To specify an alternate port for the registry, you must specify the -port option when starting up rmid. For example,
    rmid -J-Djava.security.policy=rmid.policy -port 1099
starts the activation system daemon and a registry on the registry's default port, 1099.

OPTIONS

-C<someCommandLineOption>
Specifies an option that is passed as a command-line argument to each child process (activation group) of rmid when that process is created. For example, you could pass a property to each Java virtual machine spawned by the activation system daemon:
    rmid -C-Dsome.property=value
This ability to pass command-line arguments to child processes can be useful for debugging. For example, the following command:
    rmid -C-Djava.rmi.server.logCalls=true
will enable server-call logging in all child JVMs.

-J<someCommandLineOption>
Specifies an option that is passed to the java interpreter running rmid. For example, to specify that rmid use a policy file named rmid.policy, the -J option can be used to define the java.security.policy property on rmid's command line, for example:
    rmid -J-Djava.security.policy=rmid.policy
-J-Dsun.rmi.activation.execPolicy=<policy>
Specifies the policy that rmid employs to check commands and command-line options used to launch the JVM in which an activation group runs. Please note that this option exists only in Sun's implementation of the RMI activation daemon. If this property is not specified on the command line, the result is the same as if -J-Dsun.rmi.activation.execPolicy=default were specified. The possible values of <policy> can be default, <policyClassName>, or none:

-log dir
Specifies the name of the directory the activation system daemon uses to write its database and associated information. The log directory defaults to creating a directory, log, in the directory in which the rmid command was executed.

-port port
Specifies the port rmid's registry uses. The activation system daemon binds the ActivationSystem, with the name java.rmi.activation.ActivationSystem, in this registry. Thus, the ActivationSystem on the local machine can be obtained using the following Naming.lookup method call:
    import java.rmi.*; 
    import java.rmi.activation.*;

    ActivationSystem system; system = (ActivationSystem)
    Naming.lookup("//:port/java.rmi.activation.ActivationSystem");
-stop
Stops the current invocation of rmid, for a port specified by the -port option. If no port is specified, it will stop the rmid running on port 1098.

ENVIRONMENT VARIABLES

CLASSPATH
Used to provide the system a path to user-defined classes. Directories are separated by colons on UNIX and Macintosh and by semicolons on Win95. For example:
    .;C:\usr\local\java\classes

SEE ALSO

rmic, CLASSPATH, java


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