An RMI object representing a connector server. Remote clients - * can make connections using the {@link #newClient(Object)} method. This - * method returns an RMI object representing the connection.
- * - *User code does not usually reference this class directly. - * RMI connection servers are usually created with the class {@link - * RMIConnectorServer}. Remote clients usually create connections - * either with {@link javax.management.remote.JMXConnectorFactory} - * or by instantiating {@link RMIConnector}.
- * - *This is an abstract class. Concrete subclasses define the - * details of the client connection objects.
- * - * @since 1.5 - */ -public abstract class RMIServerImpl implements Closeable, RMIServer { - /** - *Constructs a new RMIServerImpl.
RMIServerImpl. Can be null, which is equivalent
- * to an empty Map.
- */
- public RMIServerImpl(MapExports this RMI object.
- * - * @exception IOException if this RMI object cannot be exported. - */ - protected abstract void export() throws IOException; - - /** - * Returns a remotable stub for this server object. - * @return a remotable stub. - * @exception IOException if the stub cannot be obtained - e.g the - * RMIServerImpl has not been exported yet. - **/ - public abstract Remote toStub() throws IOException; - - /** - *Sets the default ClassLoader for this connector
- * server. New client connections will use this classloader.
- * Existing client connections are unaffected.
ClassLoader to be used by this
- * connector server.
- *
- * @see #getDefaultClassLoader
- */
- public synchronized void setDefaultClassLoader(ClassLoader cl) {
- this.cl = cl;
- }
-
- /**
- * Gets the default ClassLoader used by this connector
- * server.
ClassLoader used by this
- * connector server.
- *
- * @see #setDefaultClassLoader
- */
- public synchronized ClassLoader getDefaultClassLoader() {
- return cl;
- }
-
- /**
- * Sets the MBeanServer to which this connector
- * server is attached. New client connections will interact
- * with this MBeanServer. Existing client connections are
- * unaffected.
MBeanServer. Can be null, but
- * new client connections will be refused as long as it is.
- *
- * @see #getMBeanServer
- */
- public synchronized void setMBeanServer(MBeanServer mbs) {
- this.mbeanServer = mbs;
- }
-
- /**
- * The MBeanServer to which this connector server
- * is attached. This is the last value passed to {@link
- * #setMBeanServer} on this object, or null if that method has
- * never been called.
MBeanServer to which this connector
- * is attached.
- *
- * @see #setMBeanServer
- */
- public synchronized MBeanServer getMBeanServer() {
- return mbeanServer;
- }
-
- public String getVersion() {
- // Expected format is: "protocol-version implementation-name"
- try {
- return "1.0 java_runtime_" +
- System.getProperty("java.runtime.version");
- } catch (SecurityException e) {
- return "1.0 ";
- }
- }
-
- /**
- * Creates a new client connection. This method calls {@link
- * #makeClient makeClient} and adds the returned client connection
- * object to an internal list. When this
- * RMIServerImpl is shut down via its {@link
- * #close()} method, the {@link RMIConnection#close() close()}
- * method of each object remaining in the list is called.
The fact that a client connection object is in this internal - * list does not prevent it from being garbage collected.
- * - * @param credentials this object specifies the user-defined - * credentials to be passed in to the server in order to - * authenticate the caller before creating the - *RMIConnection. Can be null.
- *
- * @return the newly-created RMIConnection. This is
- * usually the object created by makeClient, though
- * an implementation may choose to wrap that object in another
- * object implementing RMIConnection.
- *
- * @exception IOException if the new client object cannot be
- * created or exported.
- *
- * @exception SecurityException if the given credentials do not allow
- * the server to authenticate the user successfully.
- *
- * @exception IllegalStateException if {@link #getMBeanServer()}
- * is null.
- */
- public RMIConnection newClient(Object credentials) throws IOException {
- return doNewClient(credentials);
- }
-
- /**
- * This method could be overridden by subclasses defined in this package
- * to perform additional operations specific to the underlying transport
- * before creating the new client connection.
- */
- RMIConnection doNewClient(Object credentials) throws IOException {
- final boolean tracing = logger.traceOn();
-
- if (tracing) logger.trace("newClient","making new client");
-
- if (getMBeanServer() == null)
- throw new IllegalStateException("Not attached to an MBean server");
-
- Subject subject = null;
- JMXAuthenticator authenticator =
- (JMXAuthenticator) env.get(JMXConnectorServer.AUTHENTICATOR);
- if (authenticator == null) {
- /*
- * Create the JAAS-based authenticator only if authentication
- * has been enabled
- */
- if (env.get("jmx.remote.x.password.file") != null ||
- env.get("jmx.remote.x.login.config") != null) {
- authenticator = new JMXPluggableAuthenticator(env);
- }
- }
- if (authenticator != null) {
- if (tracing) logger.trace("newClient","got authenticator: " +
- authenticator.getClass().getName());
- try {
- subject = authenticator.authenticate(credentials);
- } catch (SecurityException e) {
- logger.trace("newClient", "Authentication failed: " + e);
- throw e;
- }
- }
-
- if (tracing) {
- if (subject != null)
- logger.trace("newClient","subject is not null");
- else logger.trace("newClient","no subject");
- }
-
- final String connectionId = makeConnectionId(getProtocol(), subject);
-
- if (tracing)
- logger.trace("newClient","making new connection: " + connectionId);
-
- RMIConnection client = makeClient(connectionId, subject);
-
- dropDeadReferences();
- WeakReferenceCreates a new client connection. This method is called by - * the public method {@link #newClient(Object)}.
- * - * @param connectionId the ID of the new connection. Every - * connection opened by this connector server will have a - * different ID. The behavior is unspecified if this parameter is - * null. - * - * @param subject the authenticated subject. Can be null. - * - * @return the newly-createdRMIConnection.
- *
- * @exception IOException if the new client object cannot be
- * created or exported.
- */
- protected abstract RMIConnection makeClient(String connectionId,
- Subject subject)
- throws IOException;
-
- /**
- * Closes a client connection made by {@link #makeClient makeClient}.
- *
- * @param client a connection previously returned by
- * makeClient on which the closeClient
- * method has not previously been called. The behavior is
- * unspecified if these conditions are violated, including the
- * case where client is null.
- *
- * @exception IOException if the client connection cannot be
- * closed.
- */
- protected abstract void closeClient(RMIConnection client)
- throws IOException;
-
- /**
- *
Returns the protocol string for this object. The string is
- * rmi for RMI/JRMP.
- *
- * @return the protocol string for this object.
- */
- protected abstract String getProtocol();
-
- /**
- *
Method called when a client connection created by {@link
- * #makeClient makeClient} is closed. A subclass that defines
- * makeClient must arrange for this method to be
- * called when the resultant object's {@link RMIConnection#close()
- * close} method is called. This enables it to be removed from
- * the RMIServerImpl's list of connections. It is
- * not an error for client not to be in that
- * list.
After removing client from the list of
- * connections, this method calls {@link #closeClient
- * closeClient(client)}.
client is null.
- */
- protected void clientClosed(RMIConnection client) throws IOException {
- final boolean debug = logger.debugOn();
-
- if (debug) logger.trace("clientClosed","client="+client);
-
- if (client == null)
- throw new NullPointerException("Null client");
-
- synchronized (clientList) {
- dropDeadReferences();
- for (IteratorCloses this connection server. This method first calls the - * {@link #closeServer()} method so that no new client connections - * will be accepted. Then, for each remaining {@link - * RMIConnection} object returned by {@link #makeClient - * makeClient}, its {@link RMIConnection#close() close} method is - * called.
- * - *The behavior when this method is called more than once is - * unspecified.
- * - *If {@link #closeServer()} throws an
- * IOException, the individual connections are
- * nevertheless closed, and then the IOException is
- * thrown from this method.
If {@link #closeServer()} returns normally but one or more
- * of the individual connections throws an
- * IOException, then, after closing all the
- * connections, one of those IOExceptions is thrown
- * from this method. If more than one connection throws an
- * IOException, it is unspecified which one is thrown
- * from this method.
IOException.
- */
- public synchronized void close() throws IOException {
- final boolean tracing = logger.traceOn();
- final boolean debug = logger.debugOn();
-
- if (tracing) logger.trace("close","closing");
-
- IOException ioException = null;
- try {
- if (debug) logger.debug("close","closing Server");
- closeServer();
- } catch (IOException e) {
- if (tracing) logger.trace("close","Failed to close server: " + e);
- if (debug) logger.debug("close",e);
- ioException = e;
- }
-
- if (debug) logger.debug("close","closing Clients");
- // Loop to close all clients
- while (true) {
- synchronized (clientList) {
- if (debug) logger.debug("close","droping dead references");
- dropDeadReferences();
-
- if (debug) logger.debug("close","client count: "+clientList.size());
- if (clientList.size() == 0)
- break;
- /* Loop until we find a non-null client. Because we called
- dropDeadReferences(), this will usually be the first
- element of the list, but a garbage collection could have
- happened in between. */
- for (IteratorCalled by {@link #close()} to close the connector server. - * After returning from this method, the connector server must - * not accept any new connections.
- * - * @exception IOException if the attempt to close the connector - * server failed. - */ - protected abstract void closeServer() throws IOException; - - private static synchronized String makeConnectionId(String protocol, - Subject subject) { - connectionIdNumber++; - - String clientHost = ""; - try { - clientHost = RemoteServer.getClientHost(); - /* - * According to the rules specified in the javax.management.remote - * package description, a numeric IPv6 address (detected by the - * presence of otherwise forbidden ":" character) forming a part - * of the connection id must be enclosed in square brackets. - */ - if (clientHost.contains(":")) { - clientHost = "[" + clientHost + "]"; - } - } catch (ServerNotActiveException e) { - logger.trace("makeConnectionId", "getClientHost", e); - } - - final StringBuilder buf = new StringBuilder(); - buf.append(protocol).append(":"); - if (clientHost.length() > 0) - buf.append("//").append(clientHost); - buf.append(" "); - if (subject != null) { - Set