Provides implementations of the {@linkplain net.jini.core.transaction.server.TransactionManager} service. Three implementations are available for use with the {@link com.sun.jini.start} package:

- `com.sun.jini.mahalo.ActivatableMahaloImpl` - an activatable, persistent implementation, suitable for use with {@link com.sun.jini.start.SharedActivatableServiceDescriptor}
- `com.sun.jini.mahalo.NonActivatableMahaloImpl` - a non-activatable, persistent implementation, suitable for use with {@link com.sun.jini.start.NonActivatableServiceDescriptor}
- `com.sun.jini.mahalo.TransientMahaloImpl` - a transient implementation, also suitable for use with {@link com.sun.jini.start.NonActivatableServiceDescriptor}

The JAR file `mahalo.jar`, included in the `lib` subdirectory of the Jini(TM) Technology Starter Kit (starter kit) installation, contains the classes for the three Mahalo service implementations. The `mahalo-dl.jar` in that directory contains the classes needed in the codebase for its downloaded proxies. Neither JAR file includes classes from `jsk-platform.jar`, which are included by the service starter's `start.jar` JAR file, and need to be included in the codebase of clients.

The object returned by the {@link net.jini.admin.Administrable#getAdmin Administrable.getAdmin} method on a Mahalo service proxy implements {@link net.jini.admin.JoinAdmin} and {@link com.sun.jini.admin.DestroyAdmin}.

This document provides the following information about Mahalo:

- Configuring Mahalo
- Access Control Permission Targets
- Logging
- Examples for Running Mahalo

## Configuring Mahalo

The Mahalo service implementation obtains its configuration by calling {@link net.jini.config.ConfigurationProvider#getInstance(String[], ClassLoader) ConfigurationProvider.getInstance} with the specified configOptions and the class loader for the implementation class.

The implementation supports the following configuration entries, with component `com.sun.jini.mahalo`:

• | `activationIdPreparer`
--- | ---
| Type: | {@link net.jini.security.ProxyPreparer}
| Default: | `new {@link net.jini.security.BasicProxyPreparer}()`
| Description: | The proxy preparer for the service's activation ID. The value should not be `null`. This entry is obtained at service start and restart. This entry is only used by the activatable implementation. Clients call the {@link java.rmi.activation.ActivationID#activate activate} method on instances of {@link java.rmi.activation.ActivationID} when they need to reactivate the service.

• | `activationSystemPreparer`
--- | ---
| Type: | {@link net.jini.security.ProxyPreparer}
| Default: | `new {@link net.jini.security.BasicProxyPreparer}()`
| Description: | The proxy preparer for the proxy for the activation system. The value should not be `null`. This entry is obtained at service start and restart. This entry is only used by the activatable implementation. The service calls the {@link java.rmi.activation.ActivationSystem#unregisterObject unregisterObject} method on the {@link java.rmi.activation.ActivationSystem} when the service is destroyed.

• | `discoveryManager`
--- | ---
| Type: | {@link net.jini.discovery.DiscoveryManagement}
| Default: |
    new {@link net.jini.discovery.LookupDiscoveryManager}(
        {@link net.jini.discovery.DiscoveryGroupManagement#NO_GROUPS},
        null,  // locators
        null,  // listener
        this)  // config
| Description: | Supplies an object used to discover the lookup services with which this service should register. The value should not be `null`. The object returned must also implement {@link net.jini.discovery.DiscoveryGroupManagement} and {@link net.jini.discovery.DiscoveryLocatorManagement}, and should be configured initially to discover no groups or specific lookup services. This entry is obtained at service start and restart.

• | `initialLookupAttributes`
--- | ---
| Type: | `{@link net.jini.core.entry.Entry}[]`
| Default: | `new Entry[0]`
| Description: | Entries to include in the set of attributes the service supplies when registering with lookup services, in addition to {@link net.jini.lookup.entry.ServiceInfo} and {@link com.sun.jini.lookup.entry.BasicServiceType} instances provided by the service. An empty array or `null` specifies that only the service-provided attributes should be added. The array must not contain `null` elements. This entry is obtained and used when the service is first started. Following initial startup, the set of attributes is controlled though the service's {@link net.jini.admin.JoinAdmin} administrable interface.

• | `initialLookupGroups`
--- | ---
| Type: | `String[]`
| Default: | `new String[] { "" } /* public group */`
| Description: | The names of the lookup groups that the service should discover and join. An empty array specifies that no groups should be joined. A `null` value specifies that all groups should be joined. Otherwise, the value specifies the names of the groups to join. The array must not contain `null` elements. This entry is obtained and used when the service is first started. Following initial startup, the set of lookup groups is controlled through the service's {@link net.jini.admin.JoinAdmin} administrable interface.

• | `initialLookupLocators`
--- | ---
| Type: | `{@link net.jini.core.discovery.LookupLocator}[]`
| Default: | `new LookupLocator[0]`
| Description: | The locations of specific lookup services that the service should discover and join. An empty array or `null` specifies that no specific lookup services should be joined. The array must not contain `null` elements. This entry is obtained and used when the service is first started. Following initial startup, the set of specific lookup services is controlled through the service's {@link net.jini.admin.JoinAdmin} administrable interface. The `LookupLocator` instances specified in this entry will not be prepared by the proxy preparer specified in the `locatorPreparer` entry, and will only be prepared by the preparer in the `recoveredLocatorPreparer` entry when they are being recovered.

• | `leasePeriodPolicy`
--- | ---
| Type: | {@link com.sun.jini.landlord.LeasePeriodPolicy}
| Default: |
    new {@link com.sun.jini.landlord.FixedLeasePeriodPolicy}(
        3 * 60 * 60 * 1000L,  // max = 3 hours
        60 * 60 * 1000L)      // default = 1 hour
| Description: | The policy for calculating lease grants and renewals. The value should not be `null`. The default grants leases with a maximum duration of 3 hours and a default duration of 1 hour. This entry is obtained at service start and restart.

• | `loginContext`
--- | ---
| Type: | {@link javax.security.auth.login.LoginContext}
| Default: | `null`
| Description: | If not `null`, specifies the JAAS login context to use for performing a JAAS login and supplying the {@link javax.security.auth.Subject} to use when running the service. If `null`, no JAAS login is performed. This entry is obtained at service start and restart.

• | `lookupLocatorPreparer`
--- | ---
| Type: | {@link net.jini.security.ProxyPreparer}
| Default: | `new {@link net.jini.security.BasicProxyPreparer}()`
| Description: | Prepares {@link net.jini.core.discovery.LookupLocator} instances passed to the {@link net.jini.admin.JoinAdmin} methods. The value should not be `null`. When registering with lookup services, this service may call or use the constraints assigned to the {@link net.jini.core.discovery.LookupLocator#getRegistrar getRegistrar} methods of `LookupLocator` instances returned from this preparer. This entry is obtained at service start and restart. This preparer needs to perform all operations needed to use a newly received lookup locator, typically including verifying trust in the lookup locator and setting constraints. The prepared lookup locator will be retained by the service in its persistent store. The `LookupLocator` instances obtained from the `initialLookupLocators` configuration entry will not be prepared by this preparer.

• | `participantPreparer`
--- | ---
| Type: | {@link net.jini.security.ProxyPreparer}
| Default: | `new {@link net.jini.security.BasicProxyPreparer}()`
| Description: | Preparer for {@link net.jini.core.transaction.server.TransactionParticipant} proxies that have joined transactions from this service via the {@link net.jini.core.transaction.server.TransactionManager#join join} method. This preparer is used to prepare proxies only when they initially join with this service. The value should not be `null`. The preparer must return a listener which is equal to the original listener as determined by {@link java.lang.Object#equals Object.equals}. This entry is obtained at service start and restart. This preparer needs to perform all operations needed to use a newly received participant, typically including verifying trust in the participant proxy, granting permissions, and setting constraints. The prepared participant will be retained by the service in its persistent store. The service (potentially) calls the {@link net.jini.core.transaction.server.TransactionParticipant#abort abort}, {@link net.jini.core.transaction.server.TransactionParticipant#commit commit}, {@link net.jini.core.transaction.server.TransactionParticipant#prepare prepare}, and {@link net.jini.core.transaction.server.TransactionParticipant#prepareAndCommit prepareAndCommit}, methods.

• | `persistenceDirectory`
--- | ---
| Type: | `String`
| Default: | Required for persistent implementations: no default
| Description: | The directory where the service's persistent state is recorded. The value should not be `null`. This entry is obtained at service start and restart. This entry is required for persistent implementations and is otherwise not used.

• | `recoveredLookupLocatorPreparer`
--- | ---
| Type: | {@link net.jini.security.ProxyPreparer}
| Default: | `new {@link net.jini.security.BasicProxyPreparer}()`
| Description: | Prepares {@link net.jini.core.discovery.LookupLocator} instances for use when they are recovered from persistent storage. The value should not be `null`. When registering with lookup services, this service may call or use the constraints assigned to the {@link net.jini.core.discovery.LookupLocator#getRegistrar getRegistrar} methods of `LookupLocator` instances returned from this preparer. This entry is obtained at service start and restart. This entry is only used by persistent implementations. This preparer needs to perform only those operations whose results are not retained in the lookup locator itself, but need to be performed in the environment in which the lookup locator is unmarshalled. Typically no operations are needed. The `LookupLocator` instances obtained from the `initialLookupLocators` configuration entry will not be prepared by this preparer until they are being recovered.

• | `recoveredParticipantPreparer`
--- | ---
| Type: | {@link net.jini.security.ProxyPreparer}
| Default: | `new {@link net.jini.security.BasicProxyPreparer}()`
| Description: | Preparer for recovered {@link net.jini.core.transaction.server.TransactionParticipant} proxies that have been previously registered and prepared with this service (via the {@link net.jini.core.transaction.server.TransactionManager#join TransactionManager.join} method). This preparer needs to perform only those operations whose results are not retained in the participant itself, but need to be performed in the environment in which the participant is unmarshalled, typically just granting permissions. The service (potentially) calls the {@link net.jini.core.transaction.server.TransactionParticipant#abort abort}, {@link net.jini.core.transaction.server.TransactionParticipant#commit commit}, {@link net.jini.core.transaction.server.TransactionParticipant#prepare prepare}, and {@link net.jini.core.transaction.server.TransactionParticipant#prepareAndCommit prepareAndCommit}, methods on these proxies.

• | `serverExporter`
--- | ---
| Type: | {@link net.jini.export.Exporter}
| Default: |
    // Activatable implementation
    new {@link net.jini.activation.ActivationExporter}(
        activationID,
        new {@link net.jini.jeri.BasicJeriExporter}(
            {@link net.jini.jeri.tcp.TcpServerEndpoint#getInstance TcpServerEndpoint.getInstance}(0),
            new {@link net.jini.jeri.BasicILFactory}(), false, true))
    // Non-activatable implementations
    new {@link net.jini.jeri.BasicJeriExporter}(
        {@link net.jini.jeri.tcp.TcpServerEndpoint#getInstance TcpServerEndpoint.getInstance}(0),
        new {@link net.jini.jeri.BasicILFactory}(),false, true)
| Description: | The object to use for exporting the service. The value should not be `null`. In the activatable case, the call to `getEntry` will supply the activation ID in the `data` argument. This entry is obtained at service start and restart.

Mahalo passes its configuration when creating instances of the following configurable classes, which may support additional configuration entries:

- {@link net.jini.discovery.LookupDiscoveryManager}, used to discover lookup services, as specified by the `discoveryManager` configuration entry
- {@link net.jini.lookup.JoinManager}, used to manage lookup service registrations

## Access Control Permission Targets

The following table lists the remote methods on Mahalo's proxy objects and the associated target names for enforcing access control using {@link com.sun.jini.mahalo.MahaloPermission}:

Proxy Method | Target Name
--- | ---
{@link net.jini.core.transaction.server.TransactionManager#create TransactionManager.create} | create
{@link net.jini.core.transaction.server.TransactionManager#join TransactionManager.join} | join
{@link net.jini.core.transaction.server.TransactionManager#getState TransactionManager.getState} | getState
{@link net.jini.core.transaction.server.TransactionManager#commit TransactionManager.commit} | commit
{@link net.jini.core.transaction.server.TransactionManager#abort TransactionManager.abort} | abort
{@link net.jini.core.lease.Lease#renew Lease.renew} | renew
{@link net.jini.core.lease.Lease#cancel Lease.cancel} | cancel
{@link net.jini.core.lease.LeaseMap#renewAll LeaseMap.renewAll} | renewAll
{@link net.jini.core.lease.LeaseMap#cancelAll LeaseMap.cancelAll} | cancelAll
{@link net.jini.admin.Administrable#getAdmin Administrable.getAdmin} | getAdmin
{@link net.jini.admin.JoinAdmin#getLookupAttributes JoinAdmin.getLookupAttributes} | getLookupAttributes
{@link net.jini.admin.JoinAdmin#addLookupAttributes JoinAdmin.addLookupAttributes} | addLookupAttributes
{@link net.jini.admin.JoinAdmin#modifyLookupAttributes JoinAdmin.modifyLookupAttributes} | modifyLookupAttributes
{@link net.jini.admin.JoinAdmin#getLookupGroups JoinAdmin.getLookupGroups} | getLookupGroups
{@link net.jini.admin.JoinAdmin#addLookupGroups JoinAdmin.addLookupGroups} | addLookupGroups
{@link net.jini.admin.JoinAdmin#removeLookupGroups JoinAdmin.removeLookupGroups} | removeLookupGroups
{@link net.jini.admin.JoinAdmin#setLookupGroups JoinAdmin.setLookupGroups} | setLookupGroups
{@link net.jini.admin.JoinAdmin#getLookupLocators JoinAdmin.getLookupLocators} | getLookupLocators
{@link net.jini.admin.JoinAdmin#addLookupLocators JoinAdmin.addLookupLocators} | addLookupLocators
{@link net.jini.admin.JoinAdmin#removeLookupLocators JoinAdmin.removeLookupLocators} | removeLookupLocators
{@link net.jini.admin.JoinAdmin#setLookupLocators JoinAdmin.setLookupLocators} | setLookupLocators
{@link com.sun.jini.admin.DestroyAdmin#destroy DestroyAdmin.destroy} | destroy
{@link net.jini.security.proxytrust.ProxyTrust#getProxyVerifier ProxyTrust.getProxyVerifier} | getProxyVerifier
{@link com.sun.jini.start.ServiceProxyAccessor#getServiceProxy ServiceProxyAccessor.getServiceProxy} | getServiceProxy

## Loggers and Logging Levels

The Mahalo service implementation uses separate {@link java.util.logging.Logger}s, prefixed by `com.sun.jini.mahalo`, for each type of information it logs. The following tables describe the type of information logged as well as the levels of information logged.

`com.sun.jini.mahalo.destroyLogger`
Level | Description
--- | ---
{@link com.sun.jini.logging.Levels#HANDLED HANDLED} | for exceptions handled during failed service destruction
{@link java.util.logging.Level#FINEST FINEST} | for low level operation tracing during service destruction

`com.sun.jini.mahalo.initLogger`
Level | Description
--- | ---
{@link java.util.logging.Level#SEVERE SEVERE} | for problems that prevent service startup
{@link java.util.logging.Level#CONFIG CONFIG} | for configuration access during service initialization
{@link com.sun.jini.logging.Levels#HANDLED HANDLED} | for exceptions handled during service initialization
{@link java.util.logging.Level#FINEST FINEST} | for low level operation tracing during service initialization

`com.sun.jini.mahalo.operationsLogger`
Level | Description
--- | ---
{@link java.util.logging.Level#FINER FINER} | for method level tracing during service operation

`com.sun.jini.mahalo.participantLogger`
Level | Description
--- | ---
{@link java.util.logging.Level#FINEST FINEST} | for low level particpant processing tracing (join, commit, abort, etc.)

`com.sun.jini.mahalo.persistenceLogger`
Level | Description
--- | ---
{@link java.util.logging.Level#SEVERE SEVERE} | for problems that prevent service operation
{@link java.util.logging.Level#WARNING WARNING} | for problems making modifications to persistent storage, unexpected internal errors
{@link com.sun.jini.logging.Levels#HANDLED HANDLED} | for exceptions handled when persisting service state
{@link java.util.logging.Level#FINEST FINEST} | for low level persistence tracing

`com.sun.jini.mahalo.startup`
Level | Description
--- | ---
{@link java.util.logging.Level#INFO INFO} | for successful service creation message.

`com.sun.jini.mahalo.transactionsLogger`
Level | Description
--- | ---
{@link java.util.logging.Level#WARNING WARNING} | for internal errors managing transactions
{@link com.sun.jini.logging.Levels#HANDLED HANDLED} | for indefinite exceptions managing transactions
{@link java.util.logging.Level#FINEST FINEST} | for low level transaction operation tracing (creation, commit, abort, etc.)

See the {@link com.sun.jini.logging.LogManager} class for one way to use the `HANDLED` logging level in standard logging configuration files.

## Examples for Running Mahalo

This section provides examples of running Mahalo in various configurations.

- Assumptions for running the examples
- JRMP configurations
  - Transient
  - Persistent
  - Activatable
- Jini(TM) extensible remote invocation (Jini ERI) configurations
  - Transient
  - Persistent
  - Activatable
- Stopping activatable configurations

### Assumptions for Running the Examples

The examples below make the following assumptions:

- The Java(TM) 2 Platform, Standard Edition, (J2SE(TM)) has been installed, and its commands are available in the current path
- The starter kit has been installed in the install_dir directory
- The example configuration and policy files described below are available in the config_dir directory
- The local host name is your_host
- The local lookup group name is your.group
- The HTTP server for download JAR files is running on your_host and is available on port http_port. This HTTP server is serving files located in the install_dir/lib directory. You can use the {@link com.sun.jini.tool.ClassServer} class for this purpose.
- The examples are being run on UNIX platforms
- The examples are being run on a secure network where access control and authentication are not needed. See the hello example for some client and service configurations that enforce security.
- For activatable services, an activation system is running on your_host. You can use the {@link com.sun.jini.phoenix} implementation for this purpose.

Throughout the example, items in bold need to be customized for your local environment.

### Starting Transient Mahalo using JRMP

To run a transient Mahalo, which does not store any information persistently or use the activation system to restart itself, using JRMP for remote communication, run the following command.

>     java -Djava.security.policy=config_dir/jsk-all.policy \
>          -jar install_dir/lib/start.jar \
>          config_dir/start-transient-jrmp-mahalo.config

This configuration uses the following files.

#### File config_dir/jsk-all.policy

Use this security policy file for starting and running all Mahalo configurations. This file grants all permissions to local code included in the `lib` subdirectory of the starter kit installation.

>     grant codebase "file:install_dir/lib/*" {
>         permission java.security.AllPermission;
>     };

#### File config_dir/start-transient-jrmp-mahalo.config

Use this configuration source file to start transient Mahalo using JRMP.

>     import com.sun.jini.start.NonActivatableServiceDescriptor;
>     import com.sun.jini.start.ServiceDescriptor;

>     com.sun.jini.start {
>         private static codebase = "http://your_host:http_port/mahalo-dl.jar";
>         private static policy = "config_dir/jsk-all.policy";
>         private static classpath = "install_dir/lib/mahalo.jar";
>         private static config = "config_dir/transient-jrmp-mahalo.config";

>         static serviceDescriptors = new ServiceDescriptor[] {
>     	new NonActivatableServiceDescriptor(
>     	    codebase, policy, classpath,
>     	    "com.sun.jini.mahalo.TransientMahaloImpl",
>     	    new String[] { config })
>         };
>     }

#### File config_dir/transient-jrmp-mahalo.config

Use this configuration source file to run transient Mahalo using JRMP.

>     import net.jini.jrmp.JrmpExporter;

>     com.sun.jini.mahalo {
>         initialLookupGroups = new String[] { "your.group" };
>         serverExporter = new JrmpExporter();
>     }

### Starting Persistent Mahalo using JRMP

To run a persistent Mahalo, which stores information persistently but does not use the activation system to restart itself, using JRMP for remote communication, run the following command.

>     java -Djava.security.policy=config_dir/jsk-all.policy \
>          -jar install_dir/lib/start.jar \
>          config_dir/start-persistent-jrmp-mahalo.config

Note: Because JRMP does not provide a convenient way to specify the same object ID each time a given object is exported, this configuration is only useful for debugging -- an existing service proxy cannot be used after the service is restarted.

This configuration uses the following additional files.

#### File config_dir/start-persistent-jrmp-mahalo.config

Use this configuration source file to start persistent Mahalo using JRMP.

>     import com.sun.jini.start.NonActivatableServiceDescriptor;
>     import com.sun.jini.start.ServiceDescriptor;

>     com.sun.jini.start {
>         private static codebase = "http://your_host:http_port/mahalo-dl.jar";
>         private static policy = "config_dir/jsk-all.policy";
>         private static classpath = "install_dir/lib/mahalo.jar";
>         private static config = "config_dir/persistent-jrmp-mahalo.config";

>         static serviceDescriptors = new ServiceDescriptor[] {
>     	new NonActivatableServiceDescriptor(
>     	    codebase, policy, classpath,
>     	    "com.sun.jini.mahalo.NonActivatableMahaloImpl",
>     	    new String[] { config })
>         };
>     }

#### File config_dir/persistent-jrmp-mahalo.config

Use this configuration source file to run persistent Mahalo using JRMP.

>     import net.jini.jrmp.JrmpExporter;

>     com.sun.jini.mahalo {
>         initialLookupGroups = new String[] { "your.group" };
>         persistenceDirectory = "config_dir/mahalo.log";
>         serverExporter = new JrmpExporter();
>     }

### Starting Activatable Mahalo using JRMP

To run an activatable Mahalo, which stores information persistently and uses the activation system to restart itself, using JRMP for remote communication, run the following command.

>     java -Djava.security.policy=config_dir/jsk-all.policy \
>          -jar install_dir/lib/start.jar \
>          config_dir/start-activatable-jrmp-mahalo.config

You should remove the config_dir/group.log directory before running this command. Note that the activation system will restart the activatable Mahalo service as needed until Mahalo is shutdown.

Remember to remove the config_dir/mahalo.log directory before running this command if you want Mahalo to forget registrations and settings made in previous invocations.

This configuration uses the following additional files.

#### File config_dir/start-activatable-jrmp-mahalo.config

Use this configuration source file to start activatable Mahalo using JRMP.

>     import com.sun.jini.start.ServiceDescriptor;
>     import com.sun.jini.start.SharedActivatableServiceDescriptor;
>     import com.sun.jini.start.SharedActivationGroupDescriptor;

>     com.sun.jini.start {
>         private static mahaloCodebase = "http://your_host:http_port/mahalo-dl.jar";
>         private static mahaloPolicy = "config_dir/jsk-all.policy";
>         private static mahaloClasspath = "install_dir/lib/mahalo.jar";
>         private static mahaloConfig = "config_dir/activatable-jrmp-mahalo.config";

>         private static groupCodebase = "http://your_host:http_port/group-dl.jar";
>         private static groupPolicy = "config_dir/jsk-all.policy";
>         private static groupClasspath = "install_dir/lib/sharedvm.jar";
>         private static groupPersistenceDirectory = "config_dir/group.log";

>         static serviceDescriptors = new ServiceDescriptor[] {
>     	new SharedActivationGroupDescriptor(
>     	    groupPolicy, groupClasspath, groupPersistenceDirectory,
>     	    null /* serverCommand */,
>     	    null /* serverOptions */,
>     	    null /* serverProperties */),
>     	new SharedActivatableServiceDescriptor(
>     	    mahaloCodebase, mahaloPolicy, mahaloClasspath,
>     	    "com.sun.jini.mahalo.ActivatableMahaloImpl",
>     	    groupPersistenceDirectory,
>     	    new String[] { mahaloConfig },
>     	    true /* restart */)
>         };
>     }

#### File config_dir/activatable-jrmp-mahalo.config

Use this configuration source file to run activatable Mahalo using JRMP.

>     import java.rmi.activation.ActivationID;
>     import net.jini.jrmp.JrmpExporter;

>     com.sun.jini.mahalo {
>         initialLookupGroups = new String[] { "your.group" };
>         persistenceDirectory = "config_dir/mahalo.log";
>         serverExporter = new JrmpExporter((ActivationID) $data, 0);
>     }

### Stopping Activatable Mahalo

To destroy the activation group running an activatable Mahalo, under a JRMP or Jini ERI configuration, run the following command.

>     java -Djava.security.policy=config_dir/jsk-all.policy \
>          -jar install_dir/lib/destroy.jar \
>          config_dir/stop-activatable-mahalo.config

Running this command will remove the config_dir/group.log directory.

Note that this command does not actually destroy the service itself, but just destroys the activation group the service is running in. You may want to first destroy the service using Mahalo's administrable interface, or to remove the config_dir/mahalo.log directory after destroying the activation group.

This command uses the following additional file.

#### File config_dir/stop-activatable-mahalo.config

Use this configuration source file to destroy the activation group for an activatable Mahalo.

>     import com.sun.jini.start.ServiceDescriptor;
>     import com.sun.jini.start.SharedActivatableServiceDescriptor;

>     com.sun.jini.start {
>         private static codebase = "http://your_host:http_port/group-dl.jar";
>         private static policy = "config_dir/jsk-all.policy";
>         private static classpath = "install_dir/lib/group.jar";
>         private static persistenceDirectory = "config_dir/group.log";

>         static serviceDestructors = new ServiceDescriptor[] {
>     	new SharedActivatableServiceDescriptor(
>     	    codebase, policy, classpath,
>     	    "com.sun.jini.start.SharedGroupImpl",
>     	    persistenceDirectory,
>     	    null /* config */,
>     	    false /* restart */)
>         };
>     }

### Starting Transient Mahalo using Jini ERI

To run a transient Mahalo, which does not store any information persistently or use the activation system to restart itself, using Jini ERI for remote communication, run the following command.

>     java -Djava.security.policy=config_dir/jsk-all.policy \
>          -jar install_dir/lib/start.jar \
>          config_dir/start-transient-mahalo.config

This configuration uses the following additional files.

#### File config_dir/start-transient-mahalo.config

Use this configuration source file to start transient Mahalo using Jini ERI.

>     import com.sun.jini.start.NonActivatableServiceDescriptor;
>     import com.sun.jini.start.ServiceDescriptor;

>     com.sun.jini.start {
>         private static codebase = "http://your_host:http_port/mahalo-dl.jar";
>         private static policy = "config_dir/jsk-all.policy";
>         private static classpath = "install_dir/lib/mahalo.jar";
>         private static config = "config_dir/transient-mahalo.config";

>         static serviceDescriptors = new ServiceDescriptor[] {
>     	new NonActivatableServiceDescriptor(
>     	    codebase, policy, classpath,
>     	    "com.sun.jini.mahalo.TransientMahaloImpl",
>     	    new String[] { config })
>         };
>     }

#### File config_dir/transient-mahalo.config

Use this configuration source file to run transient Mahalo using Jini ERI.

>     com.sun.jini.mahalo {
>         initialLookupGroups = new String[] { "your.group" };
>     }

### Starting Persistent Mahalo using Jini ERI

To run a persistent Mahalo, which stores information persistently but does not use the activation system to restart itself, using Jini ERI for remote communication, run the following command.

>     java -Djava.security.policy=config_dir/jsk-all.policy \
>          -jar install_dir/lib/start.jar \
>          config_dir/start-persistent-mahalo.config

This configuration uses the following additional files.

#### File config_dir/start-persistent-mahalo.config

Use this configuration source file to start persistent Mahalo using Jini ERI.

>     import com.sun.jini.start.NonActivatableServiceDescriptor;
>     import com.sun.jini.start.ServiceDescriptor;

>     com.sun.jini.start {
>         private static codebase = "http://your_host:http_port/mahalo-dl.jar";
>         private static policy = "config_dir/jsk-all.policy";
>         private static classpath = "install_dir/lib/mahalo.jar";
>         private static config = "config_dir/persistent-mahalo.config";

>         static serviceDescriptors = new ServiceDescriptor[] {
>     	new NonActivatableServiceDescriptor(
>     	    codebase, policy, classpath,
>     	    "com.sun.jini.mahalo.NonActivatableMahaloImpl",
>     	    new String[] { config })
>         };
>     }

#### File config_dir/persistent-mahalo.config

Use this configuration source file to run persistent Mahalo using Jini ERI.

>     import net.jini.id.UuidFactory;
>     import net.jini.jeri.BasicILFactory;
>     import net.jini.jeri.BasicJeriExporter;
>     import net.jini.jeri.tcp.TcpServerEndpoint;

>     com.sun.jini.mahalo {
>         initialLookupGroups = new String[] { "your.group" };
>         persistenceDirectory = "config_dir/mahalo.log";
>         serverExporter = new BasicJeriExporter(
>     	TcpServerEndpoint.getInstance(obj_port),
>     	new BasicILFactory(),
>     	false,
>     	true,
>     	UuidFactory.create("obj_UUID_string"));
>     }

The obj_port is the fixed TCP port to use for listening for requests for this object. The obj_UUID_string is the {@linkplain net.jini.id.Uuid universally unique ID} for the exported object. These IDs have the form `"01234567-89ab-cdef-0123-456789abcdef"`.

Remember to remove the config_dir/mahalo.log directory before restarting persistent Mahalo if you want it to forget registrations and settings made in previous invocations.

### Starting Activatable Mahalo using Jini ERI

To run an activatable Mahalo, which stores information persistently and uses the activation system to restart itself, using Jini ERI for remote communication, run the following command.

>     java -Djava.security.policy=config_dir/jsk-all.policy \
>          -jar install_dir/lib/start.jar \
>          config_dir/start-activatable-mahalo.config

You should remove the config_dir/group.log directory before running this command. Note that the activation system will restart the activatable Mahalo service as needed until Mahalo is shutdown.

Remember to remove the config_dir/mahalo.log directory before running this command if you want Mahalo to forget registrations and settings made in previous invocations.

This configuration uses the following additional files.

#### File config_dir/start-activatable-mahalo.config

Use this configuration source file to start activatable Mahalo using Jini ERI.

>     import com.sun.jini.start.ServiceDescriptor;
>     import com.sun.jini.start.SharedActivatableServiceDescriptor;
>     import com.sun.jini.start.SharedActivationGroupDescriptor;

>     com.sun.jini.start {
>         private static mahaloCodebase = "http://your_host:http_port/mahalo-dl.jar";
>         private static mahaloPolicy = "config_dir/jsk-all.policy";
>         private static mahaloClasspath = "install_dir/lib/mahalo.jar";
>         private static mahaloConfig = "config_dir/activatable-mahalo.config";

>         private static groupCodebase = "http://your_host:http_port/group-dl.jar";
>         private static groupPolicy = "config_dir/jsk-all.policy";
>         private static groupClasspath = "install_dir/lib/sharedvm.jar";
>         private static groupPersistenceDirectory = "config_dir/group.log";

>         static serviceDescriptors = new ServiceDescriptor[] {
>     	new SharedActivationGroupDescriptor(
>     	    groupPolicy, groupClasspath, groupPersistenceDirectory,
>     	    null /* serverCommand */,
>     	    null /* serverOptions */,
>     	    null /* serverProperties */),
>     	new SharedActivatableServiceDescriptor(
>     	    mahaloCodebase, mahaloPolicy, mahaloClasspath,
>     	    "com.sun.jini.mahalo.ActivatableMahaloImpl",
>     	    groupPersistenceDirectory,
>     	    new String[] { mahaloConfig },
>     	    true /* restart */)
>         };
>     }

#### File config_dir/activatable-mahalo.config

Use this configuration source file to run activatable Mahalo using Jini ERI.

>     com.sun.jini.mahalo {
>         initialLookupGroups = new String[] { "your.group" };
>         persistenceDirectory = "config_dir/mahalo.log";
>     }

@see net.jini.core.transaction.server.TransactionManager