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author | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
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committer | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
commit | 554fd8c5195424bdbcabf5de30fdc183aba391bd (patch) | |
tree | 976dc5ab7fddf506dadce60ae936f43f58787092 /libjava/classpath/gnu/java/rmi/server/ActivatableRef.java | |
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Diffstat (limited to 'libjava/classpath/gnu/java/rmi/server/ActivatableRef.java')
-rw-r--r-- | libjava/classpath/gnu/java/rmi/server/ActivatableRef.java | 179 |
1 files changed, 179 insertions, 0 deletions
diff --git a/libjava/classpath/gnu/java/rmi/server/ActivatableRef.java b/libjava/classpath/gnu/java/rmi/server/ActivatableRef.java new file mode 100644 index 000000000..a6faaca2e --- /dev/null +++ b/libjava/classpath/gnu/java/rmi/server/ActivatableRef.java @@ -0,0 +1,179 @@ +/* ActivatableRef.java -- Activatable server reference + Copyright (C) 2006 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package gnu.java.rmi.server; + +import java.io.IOException; +import java.io.ObjectInput; +import java.io.ObjectOutput; +import java.lang.reflect.Method; +import java.lang.reflect.Proxy; +import java.rmi.Remote; +import java.rmi.RemoteException; +import java.rmi.activation.ActivationException; +import java.rmi.activation.ActivationID; +import java.rmi.server.ObjID; +import java.rmi.server.RMIClientSocketFactory; +import java.rmi.server.RemoteObject; +import java.rmi.server.RemoteObjectInvocationHandler; +import java.rmi.server.RemoteRef; + +/** + * The activatable reference works like UnicastRef, but if the remote object + * appears to be not accessible, it tries to reactivate it before reporting + * any errors. Apart the fields of the UnicastRef, the activatable reference + * contains the ActivationID that is used for this activation. + * + * @author Audrius Meskauskas (Audriusa@Bioinformatics.org) + */ +public class ActivatableRef extends UnicastRef +{ + /** + * Use serial version UID for iteroperability + */ + private static final long serialVersionUID = 1; + + /** + * The activation id. + */ + ActivationID actId; + + /** + * Delegate call to the superclass. + */ + public ActivatableRef() + { + super(); + } + + /** + * Delegate call to the superclass. + */ + public ActivatableRef(ObjID objid, String host, int port, + RMIClientSocketFactory csf) + { + super(objid, host, port, csf); + } + + /** + * Delegate call to the superclass. + */ + public ActivatableRef(ObjID objid) + { + super(objid); + } + + /** + * Get the referencing class. + */ + public String getRefClass(ObjectOutput out) + { + return "ActivatableRef"; + } + + /** + * Read the content from the input stream. + */ + public void readExternal(ObjectInput in) throws IOException, + ClassNotFoundException + { + actId = (ActivationID) in.readObject(); + String type = in.readUTF(); + // XXX handle type.equals("") (null reference) + super.readExternal(in); + } + + /** + * Write the content to the output stream. + */ + public void writeExternal(ObjectOutput out) throws IOException + { + out.writeObject(actId); + // XXX write a "" if the "nested" reference is a null reference + out.writeUTF("UnicastRef2"); + super.writeExternal(out); + } + + /** + * Invoke the remote method on the given object and try to activate the object + * if it is not reacheable with the current manager. + */ + protected Object invokeCommon(Remote obj, Method method, Object[] params, + int opnum, long hash) throws Exception + { + UnicastConnection conn; + try + { + conn = manager.getConnection(); + } + catch (IOException e1) + { + // Connection failed: try to activate. + Remote reactivated = actId.activate(false); + + if (reactivated instanceof RemoteObject) + { + RemoteRef ref = ((RemoteObject) reactivated).getRef(); + manager = ((UnicastRef) ref).manager; + } + else if (Proxy.isProxyClass(reactivated.getClass())) + { + RemoteObjectInvocationHandler hander = + (RemoteObjectInvocationHandler) + Proxy.getInvocationHandler(reactivated); + + RemoteRef ref = hander.getRef(); + manager = ((UnicastRef) ref).manager; + } + else + throw new ActivationException("Activating into unsupported class " + + reactivated.getClass()); + + try + { + conn = manager.getConnection(); + } + catch (IOException e2) + { + throw new RemoteException("connection failed to host: " + + manager.serverName, e1); + } + } + return invokeCommon(conn, obj, method, params, opnum, hash); + } +} |