Example usage for java.lang SecurityManager checkAccess

Introduction

In this page you can find the example usage for java.lang SecurityManager checkAccess.

Prototype

public void checkAccess(ThreadGroup g) 

Source Link

Document

Throws a SecurityException if the calling thread is not allowed to modify the thread group argument.

Usage

From source file:Main.java

public static void main(String[] args) {
    System.setProperty("java.security.policy", "file:/C:/java.policy");

    SecurityManager sm = new Main();

    System.setSecurityManager(sm);

    // check if accepting access for thread group is enabled
    sm.checkAccess(new ThreadGroup("example"));

    System.out.println("Allowed!");
}

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From source file:org.apache.cassandra.concurrent.ContinuationsExecutor.java

/**
 * If there is a security manager, makes sure caller has permission to shut
 * down threads in general (see shutdownPerm). If this passes, additionally
 * makes sure the caller is allowed to interrupt each worker thread. This
 * might not be true even if first check passed, if the SecurityManager
 * treats some threads specially.//w w w.j a  va2s  .  c  o  m
 */
private void checkShutdownAccess() {
    SecurityManager security = System.getSecurityManager();
    if (security != null) {
        security.checkPermission(shutdownPerm);
        final ReentrantLock mainLock = this.mainLock;
        mainLock.lock();
        try {
            for (Worker w : workers)
                security.checkAccess(w.thread);
        } finally {
            mainLock.unlock();
        }
    }
}

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