Java 类java.rmi.server.Unreferenced 实例源码

项目：lookaside_java-1.8.0-openjdk 文件：Target.java

/**
 * Remove endpoint from the reference set.
 */
synchronized private void refSetRemove(VMID vmid) {
    // remove notification request
    DGCImpl.getDGCImpl().unregisterTarget(vmid, this);

    if (refSet.removeElement(vmid) && refSet.isEmpty()) {
        // reference set is empty, so server can be garbage collected.
        // remove object from table.
        if (DGCImpl.dgcLog.isLoggable(Log.VERBOSE)) {
            DGCImpl.dgcLog.log(Log.VERBOSE,
                "reference set is empty: target = " + this);
        }

        /*
         * If the remote object implements the Unreferenced interface,
         * invoke its unreferenced callback in a separate thread.
         */
        Remote obj = getImpl();
        if (obj instanceof Unreferenced) {
            final Unreferenced unrefObj = (Unreferenced) obj;
            AccessController.doPrivileged(
                new NewThreadAction(() -> {
                    Thread.currentThread().setContextClassLoader(ccl);
                    AccessController.doPrivileged((PrivilegedAction<Void>) () -> {
                        unrefObj.unreferenced();
                        return null;
                    }, acc);
                }, "Unreferenced-" + nextThreadNum++, false, true)).start();
                // REMIND: access to nextThreadNum not synchronized; you care?
        }

        unpinImpl();
    }
}

项目：cn1 文件：RMIObjectInfo.java

private synchronized void unreferenced() {
    final Object obj = ref.get();

    if (obj instanceof Unreferenced) {
        /*
         * Spawn unreferenced thread.
         * Start this thread with setDaemon(false) to protect VM
         * from exiting while unreferencing the object.
         * The thread is started in non-system group
         * (see comment for CreateThreadAction class).
         */
        Thread uThread = ((Thread) AccessController.doPrivileged(
                new CreateThreadAction(new Runnable() {
                    public void run() {
                        AccessController.doPrivileged(
                                new PrivilegedAction() {
                                    public Object run() {
                                        ((Unreferenced) obj).unreferenced();
                                        return null;
                                    }
                                }, acc);
                    }
                }, "Unreferenced", false, false))); //$NON-NLS-1$
        uThread.setContextClassLoader(loader);
        uThread.start();
    }
    ref.makeStrong(false);
}

项目：freeVM 文件：DGCData.java

/**
 * A per {@link java.rmi.dgc.DGC#clean(ObjID[], long, VMID, boolean)}
 * implementation of the dirty method
 * 
 * @param vmid
 *            The {@link java.rmi.dgc.VMID} updated.
 * @see java.rmi.dgc.DGC
 */
public final void clean(VMID vmid) {

    if (vmIdExpirationTimeMap.containsKey(vmid)) {
        vmIdExpirationTimeMap.remove(vmid);
        dgcCount--;
        if (vmIdExpirationTimeMap.isEmpty()) {
            if (StrongRef instanceof Unreferenced) {
                ((Unreferenced) StrongRef).unreferenced();
            }
            StrongRef = null;
        }
    }
}

项目：freeVM 文件：DGCData.java

/**
 * Eliminates the VMID's which's lease times had expired.
 * 
 * @param time
 *            The time to be taken as bound.
 * @return the eliminated VMIDs.
 */
public final Set<VMID> removeOlderThan(long time) {
    /*
     * The return value is not necesary, is there just for possible
     * extensions.
     */

    HashSet<VMID> retVMIDs = new HashSet<VMID>();
    synchronized (vmIdExpirationTimeMap) {
        Iterator<VMID> iter = vmIdExpirationTimeMap.keySet().iterator();

        while (iter.hasNext()) {
            VMID currentVMID = iter.next();
            Long iterTime = vmIdExpirationTimeMap.get(currentVMID);

            if (iterTime < time) {
                iter.remove();
                dgcCount--;
                if (vmIdExpirationTimeMap.isEmpty()) {
                    if (StrongRef instanceof Unreferenced) {
                        ((Unreferenced) StrongRef).unreferenced();
                    }
                    StrongRef = null;
                }
                retVMIDs.add(currentVMID);
            }
        }
    }

    return retVMIDs;
}

项目：freeVM 文件：DGCData.java

/**
 * A per {@link java.rmi.dgc.DGC#clean(ObjID[], long, VMID, boolean)}
 * implementation of the dirty method
 * 
 * @param vmid
 *            The {@link java.rmi.dgc.VMID} updated.
 * @see java.rmi.dgc.DGC
 */
public final void clean(VMID vmid) {

    if (vmIdExpirationTimeMap.containsKey(vmid)) {
        vmIdExpirationTimeMap.remove(vmid);
        dgcCount--;
        if (vmIdExpirationTimeMap.isEmpty()) {
            if (StrongRef instanceof Unreferenced) {
                ((Unreferenced) StrongRef).unreferenced();
            }
            StrongRef = null;
        }
    }
}

项目：freeVM 文件：DGCData.java

/**
 * Eliminates the VMID's which's lease times had expired.
 * 
 * @param time
 *            The time to be taken as bound.
 * @return the eliminated VMIDs.
 */
public final Set<VMID> removeOlderThan(long time) {
    /*
     * The return value is not necesary, is there just for possible
     * extensions.
     */

    HashSet<VMID> retVMIDs = new HashSet<VMID>();
    synchronized (vmIdExpirationTimeMap) {
        Iterator<VMID> iter = vmIdExpirationTimeMap.keySet().iterator();

        while (iter.hasNext()) {
            VMID currentVMID = iter.next();
            Long iterTime = vmIdExpirationTimeMap.get(currentVMID);
            if (iterTime < time) {
                iter.remove();
                dgcCount--;
                if (vmIdExpirationTimeMap.isEmpty()) {
                    if (StrongRef instanceof Unreferenced) {
                        ((Unreferenced) StrongRef).unreferenced();
                    }
                    StrongRef = null;
                }
                retVMIDs.add(currentVMID);
            }
        }
    }

    return retVMIDs;
}

项目：freeVM 文件：RMIObjectInfo.java

private synchronized void unreferenced() {
    final Object obj = ref.get();

    if (obj instanceof Unreferenced) {
        /*
         * Spawn unreferenced thread.
         * Start this thread with setDaemon(false) to protect VM
         * from exiting while unreferencing the object.
         * The thread is started in non-system group
         * (see comment for CreateThreadAction class).
         */
        Thread uThread = ((Thread) AccessController.doPrivileged(
                new CreateThreadAction(new Runnable() {
                    public void run() {
                        AccessController.doPrivileged(
                                new PrivilegedAction() {
                                    public Object run() {
                                        ((Unreferenced) obj).unreferenced();
                                        return null;
                                    }
                                }, acc);
                    }
                }, "Unreferenced", false, false))); //$NON-NLS-1$
        uThread.setContextClassLoader(loader);
        uThread.start();
    }
    ref.makeStrong(false);
}

项目：freeVM 文件：RMIObjectInfo.java

private synchronized void unreferenced() {
    final Object obj = ref.get();

    if (obj instanceof Unreferenced) {
        /*
         * Spawn unreferenced thread.
         * Start this thread with setDaemon(false) to protect VM
         * from exiting while unreferencing the object.
         * The thread is started in non-system group
         * (see comment for CreateThreadAction class).
         */
        Thread uThread = ((Thread) AccessController.doPrivileged(
                new CreateThreadAction(new Runnable() {
                    public void run() {
                        AccessController.doPrivileged(
                                new PrivilegedAction() {
                                    public Object run() {
                                        ((Unreferenced) obj).unreferenced();
                                        return null;
                                    }
                                }, acc);
                    }
                }, "Unreferenced", false, false))); //$NON-NLS-1$
        uThread.setContextClassLoader(loader);
        uThread.start();
    }
    ref.makeStrong(false);
}

项目：OpenJSharp 文件：Target.java

/**
 * Remove endpoint from the reference set.
 */
synchronized private void refSetRemove(VMID vmid) {
    // remove notification request
    DGCImpl.getDGCImpl().unregisterTarget(vmid, this);

    if (refSet.removeElement(vmid) && refSet.isEmpty()) {
        // reference set is empty, so server can be garbage collected.
        // remove object from table.
        if (DGCImpl.dgcLog.isLoggable(Log.VERBOSE)) {
            DGCImpl.dgcLog.log(Log.VERBOSE,
                "reference set is empty: target = " + this);
        }

        /*
         * If the remote object implements the Unreferenced interface,
         * invoke its unreferenced callback in a separate thread.
         */
        Remote obj = getImpl();
        if (obj instanceof Unreferenced) {
            final Unreferenced unrefObj = (Unreferenced) obj;
            final Thread t =
                java.security.AccessController.doPrivileged(
                    new NewThreadAction(new Runnable() {
                        public void run() {
                            unrefObj.unreferenced();
                        }
                    }, "Unreferenced-" + nextThreadNum++, false, true));
            // REMIND: access to nextThreadNum not synchronized; you care?
            /*
             * We must manually set the context class loader appropriately
             * for threads that may invoke user code (see bugid 4171278).
             */
            java.security.AccessController.doPrivileged(
                new java.security.PrivilegedAction<Void>() {
                    public Void run() {
                    t.setContextClassLoader(ccl);
                    return null;
                }
            });

            t.start();
        }

        unpinImpl();
    }
}

项目：jdk8u-jdk 文件：Target.java

/**
 * Remove endpoint from the reference set.
 */
synchronized private void refSetRemove(VMID vmid) {
    // remove notification request
    DGCImpl.getDGCImpl().unregisterTarget(vmid, this);

    if (refSet.removeElement(vmid) && refSet.isEmpty()) {
        // reference set is empty, so server can be garbage collected.
        // remove object from table.
        if (DGCImpl.dgcLog.isLoggable(Log.VERBOSE)) {
            DGCImpl.dgcLog.log(Log.VERBOSE,
                "reference set is empty: target = " + this);
        }

        /*
         * If the remote object implements the Unreferenced interface,
         * invoke its unreferenced callback in a separate thread.
         */
        Remote obj = getImpl();
        if (obj instanceof Unreferenced) {
            final Unreferenced unrefObj = (Unreferenced) obj;
            final Thread t =
                java.security.AccessController.doPrivileged(
                    new NewThreadAction(new Runnable() {
                        public void run() {
                            unrefObj.unreferenced();
                        }
                    }, "Unreferenced-" + nextThreadNum++, false, true));
            // REMIND: access to nextThreadNum not synchronized; you care?
            /*
             * We must manually set the context class loader appropriately
             * for threads that may invoke user code (see bugid 4171278).
             */
            java.security.AccessController.doPrivileged(
                new java.security.PrivilegedAction<Void>() {
                    public Void run() {
                    t.setContextClassLoader(ccl);
                    return null;
                }
            });

            t.start();
        }

        unpinImpl();
    }
}

项目：openjdk-jdk10 文件：Target.java

/**
 * Remove endpoint from the reference set.
 */
synchronized private void refSetRemove(VMID vmid) {
    // remove notification request
    DGCImpl.getDGCImpl().unregisterTarget(vmid, this);

    if (refSet.removeElement(vmid) && refSet.isEmpty()) {
        // reference set is empty, so server can be garbage collected.
        // remove object from table.
        if (DGCImpl.dgcLog.isLoggable(Log.VERBOSE)) {
            DGCImpl.dgcLog.log(Log.VERBOSE,
                "reference set is empty: target = " + this);
        }

        /*
         * If the remote object implements the Unreferenced interface,
         * invoke its unreferenced callback in a separate thread.
         */
        Remote obj = getImpl();
        if (obj instanceof Unreferenced) {
            final Unreferenced unrefObj = (Unreferenced) obj;
            final Thread t =
                java.security.AccessController.doPrivileged(
                    new NewThreadAction(new Runnable() {
                        public void run() {
                            unrefObj.unreferenced();
                        }
                    }, "Unreferenced-" + nextThreadNum++, false, true));
            // REMIND: access to nextThreadNum not synchronized; you care?
            /*
             * We must manually set the context class loader appropriately
             * for threads that may invoke user code (see bugid 4171278).
             */
            java.security.AccessController.doPrivileged(
                new java.security.PrivilegedAction<Void>() {
                    public Void run() {
                    t.setContextClassLoader(ccl);
                    return null;
                }
            });

            t.start();
        }

        unpinImpl();
    }
}

项目：openjdk9 文件：Target.java

/**
 * Remove endpoint from the reference set.
 */
synchronized private void refSetRemove(VMID vmid) {
    // remove notification request
    DGCImpl.getDGCImpl().unregisterTarget(vmid, this);

    if (refSet.removeElement(vmid) && refSet.isEmpty()) {
        // reference set is empty, so server can be garbage collected.
        // remove object from table.
        if (DGCImpl.dgcLog.isLoggable(Log.VERBOSE)) {
            DGCImpl.dgcLog.log(Log.VERBOSE,
                "reference set is empty: target = " + this);
        }

        /*
         * If the remote object implements the Unreferenced interface,
         * invoke its unreferenced callback in a separate thread.
         */
        Remote obj = getImpl();
        if (obj instanceof Unreferenced) {
            final Unreferenced unrefObj = (Unreferenced) obj;
            final Thread t =
                java.security.AccessController.doPrivileged(
                    new NewThreadAction(new Runnable() {
                        public void run() {
                            unrefObj.unreferenced();
                        }
                    }, "Unreferenced-" + nextThreadNum++, false, true));
            // REMIND: access to nextThreadNum not synchronized; you care?
            /*
             * We must manually set the context class loader appropriately
             * for threads that may invoke user code (see bugid 4171278).
             */
            java.security.AccessController.doPrivileged(
                new java.security.PrivilegedAction<Void>() {
                    public Void run() {
                    t.setContextClassLoader(ccl);
                    return null;
                }
            });

            t.start();
        }

        unpinImpl();
    }
}

项目：jdk8u_jdk 文件：Target.java

/**
 * Remove endpoint from the reference set.
 */
synchronized private void refSetRemove(VMID vmid) {
    // remove notification request
    DGCImpl.getDGCImpl().unregisterTarget(vmid, this);

    if (refSet.removeElement(vmid) && refSet.isEmpty()) {
        // reference set is empty, so server can be garbage collected.
        // remove object from table.
        if (DGCImpl.dgcLog.isLoggable(Log.VERBOSE)) {
            DGCImpl.dgcLog.log(Log.VERBOSE,
                "reference set is empty: target = " + this);
        }

        /*
         * If the remote object implements the Unreferenced interface,
         * invoke its unreferenced callback in a separate thread.
         */
        Remote obj = getImpl();
        if (obj instanceof Unreferenced) {
            final Unreferenced unrefObj = (Unreferenced) obj;
            final Thread t =
                java.security.AccessController.doPrivileged(
                    new NewThreadAction(new Runnable() {
                        public void run() {
                            unrefObj.unreferenced();
                        }
                    }, "Unreferenced-" + nextThreadNum++, false, true));
            // REMIND: access to nextThreadNum not synchronized; you care?
            /*
             * We must manually set the context class loader appropriately
             * for threads that may invoke user code (see bugid 4171278).
             */
            java.security.AccessController.doPrivileged(
                new java.security.PrivilegedAction<Void>() {
                    public Void run() {
                    t.setContextClassLoader(ccl);
                    return null;
                }
            });

            t.start();
        }

        unpinImpl();
    }
}

项目：infobip-open-jdk-8 文件：Target.java

/**
 * Remove endpoint from the reference set.
 */
synchronized private void refSetRemove(VMID vmid) {
    // remove notification request
    DGCImpl.getDGCImpl().unregisterTarget(vmid, this);

    if (refSet.removeElement(vmid) && refSet.isEmpty()) {
        // reference set is empty, so server can be garbage collected.
        // remove object from table.
        if (DGCImpl.dgcLog.isLoggable(Log.VERBOSE)) {
            DGCImpl.dgcLog.log(Log.VERBOSE,
                "reference set is empty: target = " + this);
        }

        /*
         * If the remote object implements the Unreferenced interface,
         * invoke its unreferenced callback in a separate thread.
         */
        Remote obj = getImpl();
        if (obj instanceof Unreferenced) {
            final Unreferenced unrefObj = (Unreferenced) obj;
            final Thread t =
                java.security.AccessController.doPrivileged(
                    new NewThreadAction(new Runnable() {
                        public void run() {
                            unrefObj.unreferenced();
                        }
                    }, "Unreferenced-" + nextThreadNum++, false, true));
            // REMIND: access to nextThreadNum not synchronized; you care?
            /*
             * We must manually set the context class loader appropriately
             * for threads that may invoke user code (see bugid 4171278).
             */
            java.security.AccessController.doPrivileged(
                new java.security.PrivilegedAction<Void>() {
                    public Void run() {
                    t.setContextClassLoader(ccl);
                    return null;
                }
            });

            t.start();
        }

        unpinImpl();
    }
}

项目：jdk8u-dev-jdk 文件：Target.java

/**
 * Remove endpoint from the reference set.
 */
synchronized private void refSetRemove(VMID vmid) {
    // remove notification request
    DGCImpl.getDGCImpl().unregisterTarget(vmid, this);

    if (refSet.removeElement(vmid) && refSet.isEmpty()) {
        // reference set is empty, so server can be garbage collected.
        // remove object from table.
        if (DGCImpl.dgcLog.isLoggable(Log.VERBOSE)) {
            DGCImpl.dgcLog.log(Log.VERBOSE,
                "reference set is empty: target = " + this);
        }

        /*
         * If the remote object implements the Unreferenced interface,
         * invoke its unreferenced callback in a separate thread.
         */
        Remote obj = getImpl();
        if (obj instanceof Unreferenced) {
            final Unreferenced unrefObj = (Unreferenced) obj;
            final Thread t =
                java.security.AccessController.doPrivileged(
                    new NewThreadAction(new Runnable() {
                        public void run() {
                            unrefObj.unreferenced();
                        }
                    }, "Unreferenced-" + nextThreadNum++, false, true));
            // REMIND: access to nextThreadNum not synchronized; you care?
            /*
             * We must manually set the context class loader appropriately
             * for threads that may invoke user code (see bugid 4171278).
             */
            java.security.AccessController.doPrivileged(
                new java.security.PrivilegedAction<Void>() {
                    public Void run() {
                    t.setContextClassLoader(ccl);
                    return null;
                }
            });

            t.start();
        }

        unpinImpl();
    }
}

项目：jdk7-jdk 文件：Target.java

/**
 * Remove endpoint from the reference set.
 */
synchronized private void refSetRemove(VMID vmid) {
    // remove notification request
    DGCImpl.getDGCImpl().unregisterTarget(vmid, this);

    if (refSet.removeElement(vmid) && refSet.isEmpty()) {
        // reference set is empty, so server can be garbage collected.
        // remove object from table.
        if (DGCImpl.dgcLog.isLoggable(Log.VERBOSE)) {
            DGCImpl.dgcLog.log(Log.VERBOSE,
                "reference set is empty: target = " + this);
        }

        /*
         * If the remote object implements the Unreferenced interface,
         * invoke its unreferenced callback in a separate thread.
         */
        Remote obj = getImpl();
        if (obj instanceof Unreferenced) {
            final Unreferenced unrefObj = (Unreferenced) obj;
            final Thread t =
                java.security.AccessController.doPrivileged(
                    new NewThreadAction(new Runnable() {
                        public void run() {
                            unrefObj.unreferenced();
                        }
                    }, "Unreferenced-" + nextThreadNum++, false, true));
            // REMIND: access to nextThreadNum not synchronized; you care?
            /*
             * We must manually set the context class loader appropriately
             * for threads that may invoke user code (see bugid 4171278).
             */
            java.security.AccessController.doPrivileged(
                new java.security.PrivilegedAction<Void>() {
                    public Void run() {
                    t.setContextClassLoader(ccl);
                    return null;
                }
            });

            t.start();
        }

        unpinImpl();
    }
}

项目：openjdk-source-code-learn 文件：Target.java

/**
 * Remove endpoint from the reference set.
 */
synchronized private void refSetRemove(VMID vmid) {
    // remove notification request
    DGCImpl.getDGCImpl().unregisterTarget(vmid, this);

    if (refSet.removeElement(vmid) && refSet.isEmpty()) {
        // reference set is empty, so server can be garbage collected.
        // remove object from table.
        if (DGCImpl.dgcLog.isLoggable(Log.VERBOSE)) {
            DGCImpl.dgcLog.log(Log.VERBOSE,
                "reference set is empty: target = " + this);
        }

        /*
         * If the remote object implements the Unreferenced interface,
         * invoke its unreferenced callback in a separate thread.
         */
        Remote obj = getImpl();
        if (obj instanceof Unreferenced) {
            final Unreferenced unrefObj = (Unreferenced) obj;
            final Thread t =
                java.security.AccessController.doPrivileged(
                    new NewThreadAction(new Runnable() {
                        public void run() {
                            unrefObj.unreferenced();
                        }
                    }, "Unreferenced-" + nextThreadNum++, false, true));
            // REMIND: access to nextThreadNum not synchronized; you care?
            /*
             * We must manually set the context class loader appropriately
             * for threads that may invoke user code (see bugid 4171278).
             */
            java.security.AccessController.doPrivileged(
                new java.security.PrivilegedAction<Void>() {
                    public Void run() {
                    t.setContextClassLoader(ccl);
                    return null;
                }
            });

            t.start();
        }

        unpinImpl();
    }
}

项目：OLD-OpenJDK8 文件：Target.java

/**
 * Remove endpoint from the reference set.
 */
synchronized private void refSetRemove(VMID vmid) {
    // remove notification request
    DGCImpl.getDGCImpl().unregisterTarget(vmid, this);

    if (refSet.removeElement(vmid) && refSet.isEmpty()) {
        // reference set is empty, so server can be garbage collected.
        // remove object from table.
        if (DGCImpl.dgcLog.isLoggable(Log.VERBOSE)) {
            DGCImpl.dgcLog.log(Log.VERBOSE,
                "reference set is empty: target = " + this);
        }

        /*
         * If the remote object implements the Unreferenced interface,
         * invoke its unreferenced callback in a separate thread.
         */
        Remote obj = getImpl();
        if (obj instanceof Unreferenced) {
            final Unreferenced unrefObj = (Unreferenced) obj;
            final Thread t =
                java.security.AccessController.doPrivileged(
                    new NewThreadAction(new Runnable() {
                        public void run() {
                            unrefObj.unreferenced();
                        }
                    }, "Unreferenced-" + nextThreadNum++, false, true));
            // REMIND: access to nextThreadNum not synchronized; you care?
            /*
             * We must manually set the context class loader appropriately
             * for threads that may invoke user code (see bugid 4171278).
             */
            java.security.AccessController.doPrivileged(
                new java.security.PrivilegedAction<Void>() {
                    public Void run() {
                    t.setContextClassLoader(ccl);
                    return null;
                }
            });

            t.start();
        }

        unpinImpl();
    }
}

项目：openjdk-jdk7u-jdk 文件：Target.java

/**
 * Remove endpoint from the reference set.
 */
synchronized private void refSetRemove(VMID vmid) {
    // remove notification request
    DGCImpl.getDGCImpl().unregisterTarget(vmid, this);

    if (refSet.removeElement(vmid) && refSet.isEmpty()) {
        // reference set is empty, so server can be garbage collected.
        // remove object from table.
        if (DGCImpl.dgcLog.isLoggable(Log.VERBOSE)) {
            DGCImpl.dgcLog.log(Log.VERBOSE,
                "reference set is empty: target = " + this);
        }

        /*
         * If the remote object implements the Unreferenced interface,
         * invoke its unreferenced callback in a separate thread.
         */
        Remote obj = getImpl();
        if (obj instanceof Unreferenced) {
            final Unreferenced unrefObj = (Unreferenced) obj;
            final Thread t =
                java.security.AccessController.doPrivileged(
                    new NewThreadAction(new Runnable() {
                        public void run() {
                            unrefObj.unreferenced();
                        }
                    }, "Unreferenced-" + nextThreadNum++, false, true));
            // REMIND: access to nextThreadNum not synchronized; you care?
            /*
             * We must manually set the context class loader appropriately
             * for threads that may invoke user code (see bugid 4171278).
             */
            java.security.AccessController.doPrivileged(
                new java.security.PrivilegedAction<Void>() {
                    public Void run() {
                    t.setContextClassLoader(ccl);
                    return null;
                }
            });

            t.start();
        }

        unpinImpl();
    }
}

项目：openjdk-icedtea7 文件：Target.java

/**
 * Remove endpoint from the reference set.
 */
synchronized private void refSetRemove(VMID vmid) {
    // remove notification request
    DGCImpl.getDGCImpl().unregisterTarget(vmid, this);

    if (refSet.removeElement(vmid) && refSet.isEmpty()) {
        // reference set is empty, so server can be garbage collected.
        // remove object from table.
        if (DGCImpl.dgcLog.isLoggable(Log.VERBOSE)) {
            DGCImpl.dgcLog.log(Log.VERBOSE,
                "reference set is empty: target = " + this);
        }

        /*
         * If the remote object implements the Unreferenced interface,
         * invoke its unreferenced callback in a separate thread.
         */
        Remote obj = getImpl();
        if (obj instanceof Unreferenced) {
            final Unreferenced unrefObj = (Unreferenced) obj;
            final Thread t =
                java.security.AccessController.doPrivileged(
                    new NewThreadAction(new Runnable() {
                        public void run() {
                            unrefObj.unreferenced();
                        }
                    }, "Unreferenced-" + nextThreadNum++, false, true));
            // REMIND: access to nextThreadNum not synchronized; you care?
            /*
             * We must manually set the context class loader appropriately
             * for threads that may invoke user code (see bugid 4171278).
             */
            java.security.AccessController.doPrivileged(
                new java.security.PrivilegedAction<Void>() {
                    public Void run() {
                    t.setContextClassLoader(ccl);
                    return null;
                }
            });

            t.start();
        }

        unpinImpl();
    }
}