Java Doc for CreateThreadAction.java in  » Apache-Harmony-Java-SE » org-package » org » apache » harmony » rmi » common » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Apache Harmony Java SE » org package » org.apache.harmony.rmi.common   Source Cross Reference   Class Diagram   Java Document (Java Doc)   java.lang.Object    org.apache.harmony.rmi.common.CreateThreadAction CreateThreadAction public class CreateThreadAction implements PrivilegedAction(Code) Action for privileged Threads creation. There are 2 ThreadGroups used in RMI runtime: 1) System ThreadGroup, i.e. the topmost non-null ThreadGroup. All RMI internal threads are created in this group 2) Non-system ThreadGroup, i.e. the child of the system ThreadGroup. There are 2 cases when the thread is created in this group: a) When the remote call is accepted on the server side b) When the unreferenced thread is started There are 2 reasons why 2 threads are needed: 1) If we create all threads in the system ThreadGroup than if the implementation of remote method has the code starting the new thread, we'll get AccessControllException requiring java.lang.RuntimePermission("modifyThreadGroup") and java.lang.RuntimePermission("modifyThread") permissions because it's not allowed by default to create a new thread in the system group 2) If we create all threads (including RMI internal ones) in non-system ThreadGroup then the malicious code could potentially interrupt RMI internal threads by using Thread.enumerate() static method. author:    Mikhail A. Markov version:    $Revision: 1.1.2.2 $ Constructor Summary public   CreateThreadAction(Runnable r, String name, boolean isDaemon)      Constructs CreateThreadAction to create a new Thread in the system ThreadGroup. public   CreateThreadAction(Runnable r, String name, boolean isDaemon, boolean isSystem)      Constructs CreateThreadAction to create Thread. Method Summary public  Object run()      Creates the thread. Constructor Detail CreateThreadAction public CreateThreadAction(Runnable r, String name, boolean isDaemon)(Code) Constructs CreateThreadAction to create a new Thread in the system ThreadGroup. Parameters:   r - Runnable object for Thread creation Parameters:   name - name of thread to be created Parameters:   isDaemon - true if thread to be created should be a daemon CreateThreadAction public CreateThreadAction(Runnable r, String name, boolean isDaemon, boolean isSystem)(Code) Constructs CreateThreadAction to create Thread. Parameters:   r - Runnable object for Thread creation Parameters:   name - name of thread to be created Parameters:   isDaemon - true if thread to be created should be a daemon Parameters:   isSystem - true if system ThreadGroup should be used and falseotherwise Method Detail run public Object run()(Code) Creates the thread. started thread Methods inherited from java.lang.Object native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc) public boolean equals(Object obj)(Code)(Java Doc) protected void finalize() throws Throwable(Code)(Java Doc) final native public Class getClass()(Code)(Java Doc) native public int hashCode()(Code)(Java Doc) final native public void notify()(Code)(Java Doc) final native public void notifyAll()(Code)(Java Doc) public String toString()(Code)(Java Doc) final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc) final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc) final public void wait() throws InterruptedException(Code)(Java Doc)