Example usage for java.security AccessController getContext

Introduction

In this page you can find the example usage for java.security AccessController getContext.

Prototype


public static AccessControlContext getContext()

Source Link

Document

This method takes a "snapshot" of the current calling context, which includes the current Thread's inherited AccessControlContext and any limited privilege scope, and places it in an AccessControlContext object.

Usage

From source file:org.elasticsearch.hadoop.script.GroovyScriptEngineService.java

public GroovyScriptEngineService(Settings settings) {
    super(settings);

    deprecationLogger.deprecated("[groovy] scripts are deprecated, use [painless] scripts instead");

    // Creates the classloader here in order to isolate Groovy-land code
    final SecurityManager sm = System.getSecurityManager();
    if (sm != null) {
        sm.checkPermission(new SpecialPermission());
    }/*from   www. j ava 2 s  . c  o m*/
    this.loader = AccessController.doPrivileged((PrivilegedAction<ClassLoader>) () -> {
        // snapshot our context (which has permissions for classes), since the script has none
        AccessControlContext context = AccessController.getContext();
        return new ClassLoader(getClass().getClassLoader()) {
            @Override
            protected Class<?> loadClass(String name, boolean resolve) throws ClassNotFoundException {
                if (sm != null) {
                    try {
                        context.checkPermission(new ClassPermission(name));
                    } catch (SecurityException e) {
                        throw new ClassNotFoundException(name, e);
                    }
                }
                return super.loadClass(name, resolve);
            }
        };
    });
}

From source file:org.jbpm.security.authentication.SubjectAuthenticationService.java

public String getActorId() {
    if (actorId == null) {
        Subject subject = Subject.getSubject(AccessController.getContext());
        if (subject == null) {
            log.warn("no subject exists! cannot get actorId");
            return null;
        }/*from  w  ww. j ava 2  s  .c o m*/

        Set principals = subject.getPrincipals(principalClass);
        if (principals != null && !principals.isEmpty()) {
            // always use the first one (so be patient what Principal classes are used)
            Principal principal = (Principal) principals.iterator().next();
            actorId = principal.getName();
        }
    }
    return actorId;
}