
org.apache.river.reggie.proxy.ConstrainableRegistrarProxy Maven / Gradle / Ivy
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* Licensed to the Apache Software Foundation (ASF) under one
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* distributed with this work for additional information
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* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
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* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.river.reggie.proxy;
import org.apache.river.proxy.ConstrainableProxyUtil;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.lang.reflect.Method;
import java.rmi.MarshalledObject;
import net.jini.admin.Administrable;
import net.jini.core.constraint.MethodConstraints;
import net.jini.core.constraint.RemoteMethodControl;
import net.jini.core.event.RemoteEventListener;
import net.jini.core.lookup.ServiceID;
import net.jini.core.lookup.ServiceItem;
import net.jini.core.lookup.ServiceRegistrar;
import net.jini.core.lookup.ServiceTemplate;
import net.jini.security.proxytrust.ProxyTrustIterator;
import net.jini.security.proxytrust.SingletonProxyTrustIterator;
import org.apache.river.api.io.AtomicSerial;
import org.apache.river.api.io.AtomicSerial.GetArg;
/**
* RegistrarProxy subclass that supports constraints.
*
* @author Sun Microsystems, Inc.
*
*/
@AtomicSerial
final class ConstrainableRegistrarProxy
extends RegistrarProxy implements RemoteMethodControl
{
private static final long serialVersionUID = 2L;
/** Mappings between ServiceRegistrar and Registrar methods */
static final Method[] methodMappings = {
Util.getMethod(ServiceRegistrar.class, "getEntryClasses",
new Class[]{ ServiceTemplate.class }),
Util.getMethod(Registrar.class, "getEntryClasses",
new Class[]{ Template.class }),
Util.getMethod(ServiceRegistrar.class, "getFieldValues",
new Class[]{ ServiceTemplate.class, int.class,
String.class }),
Util.getMethod(Registrar.class, "getFieldValues",
new Class[]{ Template.class, int.class, int.class }),
Util.getMethod(ServiceRegistrar.class, "getGroups", new Class[0]),
Util.getMethod(Registrar.class, "getMemberGroups", new Class[0]),
Util.getMethod(ServiceRegistrar.class, "getLocator", new Class[0]),
Util.getMethod(Registrar.class, "getLocator", new Class[0]),
Util.getMethod(ServiceRegistrar.class, "getServiceTypes",
new Class[]{ ServiceTemplate.class, String.class }),
Util.getMethod(Registrar.class, "getServiceTypes",
new Class[]{ Template.class, String.class }),
Util.getMethod(ServiceRegistrar.class, "lookup",
new Class[]{ ServiceTemplate.class }),
Util.getMethod(Registrar.class, "lookup",
new Class[]{ Template.class }),
Util.getMethod(ServiceRegistrar.class, "lookup",
new Class[]{ ServiceTemplate.class, int.class }),
Util.getMethod(Registrar.class, "lookup",
new Class[]{ Template.class, int.class }),
Util.getMethod(ServiceRegistrar.class, "notify",
new Class[]{ ServiceTemplate.class, int.class,
RemoteEventListener.class,
MarshalledObject.class, long.class }),
Util.getMethod(Registrar.class, "notify",
new Class[]{ Template.class, int.class,
RemoteEventListener.class,
MarshalledObject.class, long.class }),
Util.getMethod(ServiceRegistrar.class, "register",
new Class[]{ ServiceItem.class, long.class }),
Util.getMethod(Registrar.class, "register",
new Class[]{ Item.class, long.class }),
Util.getMethod(Administrable.class, "getAdmin", new Class[0]),
Util.getMethod(Administrable.class, "getAdmin", new Class[0])
};
/** Client constraints for this proxy, or null */
private final MethodConstraints constraints;
private static MethodConstraints check(GetArg arg)
throws IOException, ClassNotFoundException{
RegistrarProxy sup = new RegistrarProxy(arg);
MethodConstraints constraints = arg.get("constraints", null, MethodConstraints.class);
MethodConstraints proxyCon = null;
if (sup.server instanceof RemoteMethodControl &&
(proxyCon = ((RemoteMethodControl)sup.server).getConstraints()) != null) {
// Constraints set during proxy deserialization.
return ConstrainableProxyUtil.reverseTranslateConstraints(
proxyCon, methodMappings);
}
ConstrainableProxyUtil.verifyConsistentConstraints(
constraints, sup.server, methodMappings);
return constraints;
}
ConstrainableRegistrarProxy(GetArg arg)
throws IOException, ClassNotFoundException{
this(arg, check(arg));
}
ConstrainableRegistrarProxy(GetArg arg, MethodConstraints constraints) throws IOException{
super(arg);
this.constraints = constraints;
}
/**
* Creates new ConstrainableRegistrarProxy with given server reference,
* service ID and client constraints.
*/
ConstrainableRegistrarProxy(Registrar server,
ServiceID registrarID,
MethodConstraints constraints)
{
super((Registrar) ((RemoteMethodControl) server).setConstraints(
ConstrainableProxyUtil.translateConstraints(
constraints, methodMappings)),
registrarID);
this.constraints = constraints;
}
// javadoc inherited from RemoteMethodControl.setConstraints
public RemoteMethodControl setConstraints(MethodConstraints constraints) {
return new ConstrainableRegistrarProxy(
server, registrarID, constraints);
}
// javadoc inherited from RemoteMethodControl.getConstraints
public MethodConstraints getConstraints() {
return constraints;
}
/**
* Returns iterator used by ProxyTrustVerifier to retrieve a trust verifier
* for this object.
*/
private ProxyTrustIterator getProxyTrustIterator() {
return new SingletonProxyTrustIterator(server);
}
private void writeObject(ObjectOutputStream out) throws IOException {
out.defaultWriteObject();
}
/**
* Verifies that the client constraints for this proxy are consistent with
* those set on the underlying server ref.
*/
private void readObject(ObjectInputStream in)
throws IOException, ClassNotFoundException
{
in.defaultReadObject();
ConstrainableProxyUtil.verifyConsistentConstraints(
constraints, server, methodMappings);
}
}
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