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JDK 11 java.rmi.jmod - RMI Module
JDK 11 java.rmi.jmod is the JMOD file for JDK 11 RMI (Remote Method Invocation) module.
JDK 11 RMI module compiled class files are stored in \fyicenter\jdk-11.0.1\jmods\java.rmi.jmod.
JDK 11 RMI module compiled class files are also linked and stored in the \fyicenter\jdk-11.0.1\lib\modules JImage file.
JDK 11 RMI module source code files are stored in \fyicenter\jdk-11.0.1\lib\src.zip\java.rmi.
You can click and view the content of each source code file in the list below.
✍: FYIcenter
⏎ java/rmi/activation/ActivationGroup.java
/* * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms. * * * * * * * * * * * * * * * * * * * * */ package java.rmi.activation; import java.lang.reflect.Constructor; import java.lang.reflect.InvocationTargetException; import java.rmi.MarshalledObject; import java.rmi.Naming; import java.rmi.Remote; import java.rmi.RemoteException; import java.rmi.activation.UnknownGroupException; import java.rmi.activation.UnknownObjectException; import java.rmi.server.RMIClassLoader; import java.rmi.server.UnicastRemoteObject; import java.security.AccessController; import java.security.PrivilegedAction; /** * An <code>ActivationGroup</code> is responsible for creating new * instances of "activatable" objects in its group, informing its * <code>ActivationMonitor</code> when either: its object's become * active or inactive, or the group as a whole becomes inactive. <p> * * An <code>ActivationGroup</code> is <i>initially</i> created in one * of several ways: <ul> * <li>as a side-effect of creating an <code>ActivationDesc</code> * without an explicit <code>ActivationGroupID</code> for the * first activatable object in the group, or * <li>via the <code>ActivationGroup.createGroup</code> method * <li>as a side-effect of activating the first object in a group * whose <code>ActivationGroupDesc</code> was only registered.</ul><p> * * Only the activator can <i>recreate</i> an * <code>ActivationGroup</code>. The activator spawns, as needed, a * separate VM (as a child process, for example) for each registered * activation group and directs activation requests to the appropriate * group. It is implementation specific how VMs are spawned. An * activation group is created via the * <code>ActivationGroup.createGroup</code> static method. The * <code>createGroup</code> method has two requirements on the group * to be created: 1) the group must be a concrete subclass of * <code>ActivationGroup</code>, and 2) the group must have a * constructor that takes two arguments: * * <ul> * <li> the group's <code>ActivationGroupID</code>, and * <li> the group's initialization data (in a * <code>java.rmi.MarshalledObject</code>)</ul><p> * * When created, the default implementation of * <code>ActivationGroup</code> will override the system properties * with the properties requested when its * <code>ActivationGroupDesc</code> was created, and will set a * {@link SecurityManager} as the default system * security manager. If your application requires specific properties * to be set when objects are activated in the group, the application * should create a special <code>Properties</code> object containing * these properties, then create an <code>ActivationGroupDesc</code> * with the <code>Properties</code> object, and use * <code>ActivationGroup.createGroup</code> before creating any * <code>ActivationDesc</code>s (before the default * <code>ActivationGroupDesc</code> is created). If your application * requires the use of a security manager other than * {@link SecurityManager}, in the * ActivativationGroupDescriptor properties list you can set * <code>java.security.manager</code> property to the name of the security * manager you would like to install. * * @author Ann Wollrath * @see ActivationInstantiator * @see ActivationGroupDesc * @see ActivationGroupID * @since 1.2 */ public abstract class ActivationGroup extends UnicastRemoteObject implements ActivationInstantiator { /** * @serial the group's identifier */ private ActivationGroupID groupID; /** * @serial the group's monitor */ private ActivationMonitor monitor; /** * @serial the group's incarnation number */ private long incarnation; /** the current activation group for this VM */ private static ActivationGroup currGroup; /** the current group's identifier */ private static ActivationGroupID currGroupID; /** the current group's activation system */ private static ActivationSystem currSystem; /** used to control a group being created only once */ private static boolean canCreate = true; /** indicate compatibility with the Java 2 SDK v1.2 version of class */ private static final long serialVersionUID = -7696947875314805420L; /** * Constructs an activation group with the given activation group * identifier. The group is exported as a * <code>java.rmi.server.UnicastRemoteObject</code>. * * @param groupID the group's identifier * @throws RemoteException if this group could not be exported * @throws UnsupportedOperationException if and only if activation is * not supported by this implementation * @since 1.2 */ protected ActivationGroup(ActivationGroupID groupID) throws RemoteException { // call super constructor to export the object super(); this.groupID = groupID; } /** * The group's <code>inactiveObject</code> method is called * indirectly via a call to the <code>Activatable.inactive</code> * method. A remote object implementation must call * <code>Activatable</code>'s <code>inactive</code> method when * that object deactivates (the object deems that it is no longer * active). If the object does not call * <code>Activatable.inactive</code> when it deactivates, the * object will never be garbage collected since the group keeps * strong references to the objects it creates. * * <p>The group's <code>inactiveObject</code> method unexports the * remote object from the RMI runtime so that the object can no * longer receive incoming RMI calls. An object will only be unexported * if the object has no pending or executing calls. * The subclass of <code>ActivationGroup</code> must override this * method and unexport the object. * * <p>After removing the object from the RMI runtime, the group * must inform its <code>ActivationMonitor</code> (via the monitor's * <code>inactiveObject</code> method) that the remote object is * not currently active so that the remote object will be * re-activated by the activator upon a subsequent activation * request. * * <p>This method simply informs the group's monitor that the object * is inactive. It is up to the concrete subclass of ActivationGroup * to fulfill the additional requirement of unexporting the object. * * @param id the object's activation identifier * @return true if the object was successfully deactivated; otherwise * returns false. * @exception UnknownObjectException if object is unknown (may already * be inactive) * @exception RemoteException if call informing monitor fails * @exception ActivationException if group is inactive * @since 1.2 */ public boolean inactiveObject(ActivationID id) throws ActivationException, UnknownObjectException, RemoteException { getMonitor().inactiveObject(id); return true; } /** * The group's <code>activeObject</code> method is called when an * object is exported (either by <code>Activatable</code> object * construction or an explicit call to * <code>Activatable.exportObject</code>. The group must inform its * <code>ActivationMonitor</code> that the object is active (via * the monitor's <code>activeObject</code> method) if the group * hasn't already done so. * * @param id the object's identifier * @param obj the remote object implementation * @exception UnknownObjectException if object is not registered * @exception RemoteException if call informing monitor fails * @exception ActivationException if group is inactive * @since 1.2 */ public abstract void activeObject(ActivationID id, Remote obj) throws ActivationException, UnknownObjectException, RemoteException; /** * Create and set the activation group for the current VM. The * activation group can only be set if it is not currently set. * An activation group is set using the <code>createGroup</code> * method when the <code>Activator</code> initiates the * re-creation of an activation group in order to carry out * incoming <code>activate</code> requests. A group must first be * registered with the <code>ActivationSystem</code> before it can * be created via this method. * * <p>The group class specified by the * <code>ActivationGroupDesc</code> must be a concrete subclass of * <code>ActivationGroup</code> and have a public constructor that * takes two arguments: the <code>ActivationGroupID</code> for the * group and the <code>MarshalledObject</code> containing the * group's initialization data (obtained from the * <code>ActivationGroupDesc</code>. * * <p>If the group class name specified in the * <code>ActivationGroupDesc</code> is <code>null</code>, then * this method will behave as if the group descriptor contained * the name of the default activation group implementation class. * * <p>Note that if your application creates its own custom * activation group, a security manager must be set for that * group. Otherwise objects cannot be activated in the group. * {@link SecurityManager} is set by default. * * <p>If a security manager is already set in the group VM, this * method first calls the security manager's * <code>checkSetFactory</code> method. This could result in a * <code>SecurityException</code>. If your application needs to * set a different security manager, you must ensure that the * policy file specified by the group's * <code>ActivationGroupDesc</code> grants the group the necessary * permissions to set a new security manager. (Note: This will be * necessary if your group downloads and sets a security manager). * * <p>After the group is created, the * <code>ActivationSystem</code> is informed that the group is * active by calling the <code>activeGroup</code> method which * returns the <code>ActivationMonitor</code> for the group. The * application need not call <code>activeGroup</code> * independently since it is taken care of by this method. * * <p>Once a group is created, subsequent calls to the * <code>currentGroupID</code> method will return the identifier * for this group until the group becomes inactive. * * @param id the activation group's identifier * @param desc the activation group's descriptor * @param incarnation the group's incarnation number (zero on group's * initial creation) * @return the activation group for the VM * @exception ActivationException if group already exists or if error * occurs during group creation * @exception SecurityException if permission to create group is denied. * (Note: The default implementation of the security manager * <code>checkSetFactory</code> * method requires the RuntimePermission "setFactory") * @exception UnsupportedOperationException if and only if activation is * not supported by this implementation * @see SecurityManager#checkSetFactory * @since 1.2 */ public static synchronized ActivationGroup createGroup(ActivationGroupID id, final ActivationGroupDesc desc, long incarnation) throws ActivationException { SecurityManager security = System.getSecurityManager(); if (security != null) security.checkSetFactory(); if (currGroup != null) throw new ActivationException("group already exists"); if (canCreate == false) throw new ActivationException("group deactivated and " + "cannot be recreated"); try { // load group's class String groupClassName = desc.getClassName(); Class<? extends ActivationGroup> cl; Class<? extends ActivationGroup> defaultGroupClass = sun.rmi.server.ActivationGroupImpl.class; if (groupClassName == null || // see 4252236 groupClassName.equals(defaultGroupClass.getName())) { cl = defaultGroupClass; } else { Class<?> cl0; try { cl0 = RMIClassLoader.loadClass(desc.getLocation(), groupClassName); } catch (Exception ex) { throw new ActivationException( "Could not load group implementation class", ex); } if (ActivationGroup.class.isAssignableFrom(cl0)) { cl = cl0.asSubclass(ActivationGroup.class); } else { throw new ActivationException("group not correct class: " + cl0.getName()); } } // create group Constructor<? extends ActivationGroup> constructor = cl.getConstructor(ActivationGroupID.class, MarshalledObject.class); ActivationGroup newGroup = constructor.newInstance(id, desc.getData()); currSystem = id.getSystem(); newGroup.incarnation = incarnation; newGroup.monitor = currSystem.activeGroup(id, newGroup, incarnation); currGroup = newGroup; currGroupID = id; canCreate = false; } catch (InvocationTargetException e) { e.getTargetException().printStackTrace(); throw new ActivationException("exception in group constructor", e.getTargetException()); } catch (ActivationException e) { throw e; } catch (Exception e) { throw new ActivationException("exception creating group", e); } return currGroup; } /** * Returns the current activation group's identifier. Returns null * if no group is currently active for this VM. * @exception UnsupportedOperationException if and only if activation is * not supported by this implementation * @return the activation group's identifier * @since 1.2 */ public static synchronized ActivationGroupID currentGroupID() { return currGroupID; } /** * Returns the activation group identifier for the VM. If an * activation group does not exist for this VM, a default * activation group is created. A group can be created only once, * so if a group has already become active and deactivated. * * @return the activation group identifier * @exception ActivationException if error occurs during group * creation, if security manager is not set, or if the group * has already been created and deactivated. */ static synchronized ActivationGroupID internalCurrentGroupID() throws ActivationException { if (currGroupID == null) throw new ActivationException("nonexistent group"); return currGroupID; } /** * Set the activation system for the VM. The activation system can * only be set it if no group is currently active. If the activation * system is not set via this call, then the <code>getSystem</code> * method attempts to obtain a reference to the * <code>ActivationSystem</code> by looking up the name * "java.rmi.activation.ActivationSystem" in the Activator's * registry. By default, the port number used to look up the * activation system is defined by * <code>ActivationSystem.SYSTEM_PORT</code>. This port can be overridden * by setting the property <code>java.rmi.activation.port</code>. * * <p>If there is a security manager, this method first * calls the security manager's <code>checkSetFactory</code> method. * This could result in a SecurityException. * * @param system remote reference to the <code>ActivationSystem</code> * @exception ActivationException if activation system is already set * @exception SecurityException if permission to set the activation system is denied. * (Note: The default implementation of the security manager * <code>checkSetFactory</code> * method requires the RuntimePermission "setFactory") * @exception UnsupportedOperationException if and only if activation is * not supported by this implementation * @see #getSystem * @see SecurityManager#checkSetFactory * @since 1.2 */ public static synchronized void setSystem(ActivationSystem system) throws ActivationException { SecurityManager security = System.getSecurityManager(); if (security != null) security.checkSetFactory(); if (currSystem != null) throw new ActivationException("activation system already set"); currSystem = system; } /** * Returns the activation system for the VM. The activation system * may be set by the <code>setSystem</code> method. If the * activation system is not set via the <code>setSystem</code> * method, then the <code>getSystem</code> method attempts to * obtain a reference to the <code>ActivationSystem</code> by * looking up the name "java.rmi.activation.ActivationSystem" in * the Activator's registry. By default, the port number used to * look up the activation system is defined by * <code>ActivationSystem.SYSTEM_PORT</code>. This port can be * overridden by setting the property * <code>java.rmi.activation.port</code>. * * @return the activation system for the VM/group * @exception ActivationException if activation system cannot be * obtained or is not bound * (means that it is not running) * @exception UnsupportedOperationException if and only if activation is * not supported by this implementation * @see #setSystem * @since 1.2 */ public static synchronized ActivationSystem getSystem() throws ActivationException { if (currSystem == null) { try { int port = AccessController.doPrivileged((PrivilegedAction<Integer>) () -> Integer.getInteger("java.rmi.activation.port", ActivationSystem.SYSTEM_PORT)); currSystem = (ActivationSystem) Naming.lookup("//:" + port + "/java.rmi.activation.ActivationSystem"); } catch (Exception e) { throw new ActivationException( "unable to obtain ActivationSystem", e); } } return currSystem; } /** * This protected method is necessary for subclasses to * make the <code>activeObject</code> callback to the group's * monitor. The call is simply forwarded to the group's * <code>ActivationMonitor</code>. * * @param id the object's identifier * @param mobj a marshalled object containing the remote object's stub * @exception UnknownObjectException if object is not registered * @exception RemoteException if call informing monitor fails * @exception ActivationException if an activation error occurs * @since 1.2 */ protected void activeObject(ActivationID id, MarshalledObject<? extends Remote> mobj) throws ActivationException, UnknownObjectException, RemoteException { getMonitor().activeObject(id, mobj); } /** * This protected method is necessary for subclasses to * make the <code>inactiveGroup</code> callback to the group's * monitor. The call is simply forwarded to the group's * <code>ActivationMonitor</code>. Also, the current group * for the VM is set to null. * * @exception UnknownGroupException if group is not registered * @exception RemoteException if call informing monitor fails * @since 1.2 */ protected void inactiveGroup() throws UnknownGroupException, RemoteException { try { getMonitor().inactiveGroup(groupID, incarnation); } finally { destroyGroup(); } } /** * Returns the monitor for the activation group. */ private ActivationMonitor getMonitor() throws RemoteException { synchronized (ActivationGroup.class) { if (monitor != null) { return monitor; } } throw new RemoteException("monitor not received"); } /** * Destroys the current group. */ private static synchronized void destroyGroup() { currGroup = null; currGroupID = null; // NOTE: don't set currSystem to null since it may be needed } /** * Returns the current group for the VM. * @exception ActivationException if current group is null (not active) */ static synchronized ActivationGroup currentGroup() throws ActivationException { if (currGroup == null) { throw new ActivationException("group is not active"); } return currGroup; } }
⏎ java/rmi/activation/ActivationGroup.java
Or download all of them as a single archive file:
File name: java.rmi-11.0.1-src.zip File size: 275032 bytes Release date: 2018-11-04 Download
⇒ JDK 11 java.scripting.jmod - Scripting Module
2023-10-10, 37428👍, 1💬
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