/** * Process and loop until told to stop. A callback_done will stop the loop and will return a * result. Otherwise null is returned. */ public Object run() throws CommandException { Object result = null; boolean shutdown = false; boolean closeWhenDone = true; Commands.ValueObject valueObject = new Commands.ValueObject(); // Working value object so not continually recreated. InvokableValueSender valueSender = new InvokableValueSender(); // Working valuesender so not continually recreated. try { boolean doLoop = true; /** * Note: In the cases below you will see a lot of finally clauses that null variables out. * This is because this is a long running loop, and variables declared within blocks are not * garbage collected until the method is terminated, so these variables once set would never * be GC'd. The nulling at the end of the case makes sure that any of those objects set are * now available for garbage collection when necessary. */ while (doLoop && isConnected()) { byte cmd = 0; try { if (LINUX_1_3) socket.setSoTimeout(1000); // Linux 1.3 bug, see comment on LINUX_1_3 cmd = in.readByte(); if (LINUX_1_3 && isConnected()) socket.setSoTimeout(0); // Linux 1.3 bug, see comment on LINUX_1_3 } catch (InterruptedIOException e) { continue; // Timeout, try again } switch (cmd) { case Commands.QUIT_CONNECTION: doLoop = false; break; // Close this connection case Commands.TERMINATE_SERVER: doLoop = false; shutdown = true; // Shutdown everything break; case Commands.GET_CLASS: String className = in.readUTF(); Class aClass = null; Class superClass = null; String superClassName = null; boolean added = false; try { aClass = Class.forName( className); // Turns out using JNI format for array type will work fine. added = server.getIdentityID(aClass, valueObject); boolean isInterface = aClass.isInterface(); boolean isAbstract = java.lang.reflect.Modifier.isAbstract(aClass.getModifiers()); superClass = aClass.getSuperclass(); superClassName = (superClass != null) ? superClass.getName() : ""; // $NON-NLS-1$ out.writeByte(Commands.GET_CLASS_RETURN); out.writeInt(valueObject.objectID); out.writeBoolean(isInterface); out.writeBoolean(isAbstract); out.writeUTF(superClassName); out.flush(); } catch (ClassNotFoundException e) { valueObject.set(); Commands.sendErrorCommand(out, Commands.GET_CLASS_NOT_FOUND, valueObject); } catch (ExceptionInInitializerError e) { sendException(e.getException(), valueObject, out); } catch (LinkageError e) { sendException(e, valueObject, out); } catch (Throwable e) { // Something bad, did we add a class? If we did remove it from the table. if (added) server.removeObject(server.getObject(valueObject.objectID)); throw e; } finally { // clear out for GC to work. className = null; aClass = null; superClass = null; superClassName = null; valueObject.set(); } break; case Commands.GET_CLASS_FROM_ID: int classID = in.readInt(); try { aClass = (Class) server.getObject(classID); boolean isInterface = aClass.isInterface(); boolean isAbstract = java.lang.reflect.Modifier.isAbstract(aClass.getModifiers()); superClass = aClass.getSuperclass(); superClassName = (superClass != null) ? superClass.getName() : ""; // $NON-NLS-1$ out.writeByte(Commands.GET_CLASS_ID_RETURN); out.writeUTF(aClass.getName()); out.writeBoolean(isInterface); out.writeBoolean(isAbstract); out.writeUTF(superClassName); out.flush(); } catch (ClassCastException e) { valueObject.set(); Commands.sendErrorCommand(out, Commands.CLASS_CAST_EXCEPTION, valueObject); } finally { // clear out for GC to work. aClass = null; superClass = null; superClassName = null; valueObject.set(); } break; case Commands.GET_OBJECT_DATA: int objectID = in.readInt(); Object anObject = null; try { anObject = server.getObject(objectID); valueObject.setObjectID(objectID, server.getIdentityID(anObject.getClass())); Commands.writeValue(out, valueObject, true); } catch (ClassCastException e) { valueObject.set(); Commands.sendErrorCommand(out, Commands.CLASS_CAST_EXCEPTION, valueObject); } finally { anObject = null; // Clear out for GC to work valueObject.set(); } break; case Commands.RELEASE_OBJECT: int id = in.readInt(); server.removeObject(server.getObject(id)); break; case Commands.NEW_INIT_STRING: classID = in.readInt(); // ID Of class to do new upon. String initString = in.readUTF(); // The init string. Object newValue = null; Class theClass = null; try { theClass = (Class) server.getObject(classID); if (theClass == null) { // The class wasn't found. So imply ClassNotFound exception. throw new ClassNotFoundException(); } InitializationStringParser parser = null; try { parser = InitializationStringParser.createParser(initString); newValue = parser.evaluate(); boolean primitive = parser.isPrimitive(); // If expected class is Void.TYPE, that means don't test the type of the result // to verify if correct type, just return what it really is. if (theClass != Void.TYPE && primitive != theClass.isPrimitive()) { valueObject.set(); Commands.sendErrorCommand(out, Commands.CLASS_CAST_EXCEPTION, valueObject); continue; // Goto next command. } if (primitive) { try { // Need to do special tests for compatibility and assignment. sendObject( newValue, classID != Commands.VOID_TYPE ? classID : server.getIdentityID(parser.getExpectedType()), valueObject, out, true); // This will make sure it goes out as the correct primitive type } catch (ClassCastException e) { // The returned type is not of the correct type for what is expected. valueObject.set(); Commands.sendErrorCommand(out, Commands.CLASS_CAST_EXCEPTION, valueObject); continue; // Goto next command } } else { if (newValue != null) { // Test to see if they are compatible. (Null can be assigned to any object, // so that is why it was tested out above). // If expected class is Void.TYPE, that means don't test the type of the result // to verify if correct type, just return what it really is. if (theClass != Void.TYPE && !theClass.isInstance(newValue)) { // The returned type is not of the correct type for what is expected. valueObject.set(); Commands.sendErrorCommand(out, Commands.CLASS_CAST_EXCEPTION, valueObject); continue; // Goto next command } } sendObject( newValue, NOT_A_PRIMITIVE, valueObject, out, true); // Send out as an object. } } catch (InitializationStringEvaluationException e) { if (e instanceof EvaluationException) { // Want to return the real exception. sendException(e.getOriginalException(), valueObject, out); } else { // Couldn't be evaluated, return an error for this. setExceptionIntoValue(e.getOriginalException(), valueObject); Commands.sendErrorCommand(out, Commands.CANNOT_EVALUATE_STRING, valueObject); } } finally { parser = null; // Clear out for GC to work } } catch (Throwable e) { sendException(e, valueObject, out); } finally { // Clear out for GC to work initString = null; theClass = null; newValue = null; valueObject.set(); } break; case Commands.INVOKE: Object target = null; Object[] parms = null; Class returnType = null; java.lang.reflect.Method aMethod = null; try { int methodID = in.readInt(); // ID of method to invoke aMethod = (java.lang.reflect.Method) server.getObject(methodID); // Method to invoke Commands.readValue(in, valueObject); target = getInvokableObject(valueObject); Commands.readValue(in, valueObject); if (valueObject.type == Commands.ARRAY_IDS) { // It is an array containing IDs, as it normally would be. valueSender.initialize(valueObject); Commands.readArray(in, valueObject.anInt, valueSender, valueObject, false); parms = (Object[]) valueSender.getArray(); } else { // It is all objects or null, so it should be an Object[] or null. If not, then this // is an error. parms = (Object[]) valueObject.anObject; } if (!aMethod.isAccessible()) aMethod.setAccessible( true); // We will allow all to occur. Let access control be handled by IDE and // compiler. newValue = aMethod.invoke(target, parms); returnType = aMethod.getReturnType(); if (returnType.isPrimitive()) { int returnTypeID = server.getIdentityID(returnType); // Need to tell sendObject the correct primitive type. sendObject(newValue, returnTypeID, valueObject, out, true); } else { sendObject( newValue, NOT_A_PRIMITIVE, valueObject, out, true); // Just send the object back. sendObject knows how to iterpret the type } } catch (CommandException e) { throw e; // Throw it again. These we don't want to come up as an exception proxy. // These should end the thread. } catch (java.lang.reflect.InvocationTargetException e) { // This is a wrappered exception. Return the wrappered one so it looks like // it was the real one. (Sometimes the method being invoked is on a // java.lang.reflect.Constructor.newInstance, // which in turn is an InvocationTargetException, so we will go until we don't have an // InvocationTargetException. Throwable t = e; do { t = ((java.lang.reflect.InvocationTargetException) t).getTargetException(); } while (t instanceof java.lang.reflect.InvocationTargetException); sendException(t, valueObject, out); } catch (Throwable e) { sendException(e, valueObject, out); // Turn it into a exception proxy on the client. } finally { // Clear out for GC to work valueObject.set(); parms = null; target = null; aMethod = null; returnType = null; newValue = null; valueSender.clear(); } break; case Commands.INVOKE_WITH_METHOD_PASSED: aClass = null; String methodName = null; Class[] parmTypes = null; target = null; parms = null; returnType = null; aMethod = null; try { Commands.readValue(in, valueObject); aClass = (Class) getInvokableObject(valueObject); // The class that has the method. methodName = in.readUTF(); Commands.readValue(in, valueObject); if (valueObject.type == Commands.ARRAY_IDS) { // It is an array containing IDs, as it normally would be. valueSender.initialize(valueObject); Commands.readArray(in, valueObject.anInt, valueSender, valueObject, false); parmTypes = (Class[]) valueSender.getArray(); } else { // It null, so it should be an null. If not, then this is an error. parmTypes = null; } aMethod = aClass.getMethod(methodName, parmTypes); // Now we get the info for the invocation of the method and execute it. Commands.readValue(in, valueObject); target = getInvokableObject(valueObject); Commands.readValue(in, valueObject); if (valueObject.type == Commands.ARRAY_IDS) { // It is an array containing IDs, as it normally would be. valueSender.initialize(valueObject); Commands.readArray(in, valueObject.anInt, valueSender, valueObject, false); parms = (Object[]) valueSender.getArray(); } else { // It is all objects or null, so it should be an Object[] or null. If not, then this // is an error. parms = (Object[]) valueObject.anObject; } if (!aMethod.isAccessible()) aMethod.setAccessible( true); // We will allow all to occur. Let access control be handled by IDE and // compiler. newValue = aMethod.invoke(target, parms); returnType = aMethod.getReturnType(); if (returnType.isPrimitive()) { int returnTypeID = server.getIdentityID(returnType); // Need to tell sendObject the correct primitive type. sendObject(newValue, returnTypeID, valueObject, out, true); } else { sendObject( newValue, NOT_A_PRIMITIVE, valueObject, out, true); // Just send the object back. sendObject knows how to iterpret the type } } catch (CommandException e) { throw e; // Throw it again. These we don't want to come up as an exception proxy. // These should end the thread. } catch (java.lang.reflect.InvocationTargetException e) { // This is a wrappered exception. Return the wrappered one so it looks like // it was the real one. (Sometimes the method being invoked is on a // java.lang.reflect.Constructor.newInstance, // which in turn is an InvocationTargetException, so we will go until we don't have an // InvocationTargetException. Throwable t = e; do { t = ((java.lang.reflect.InvocationTargetException) t).getTargetException(); } while (t instanceof java.lang.reflect.InvocationTargetException); sendException(t, valueObject, out); } catch (Throwable e) { sendException(e, valueObject, out); // Turn it into a exception proxy on the client. } finally { aClass = null; methodName = null; parmTypes = null; // Clear out for GC to work valueObject.set(); parms = null; target = null; aMethod = null; returnType = null; newValue = null; valueSender.clear(); } break; case Commands.GET_ARRAY_CONTENTS: try { target = server.getObject(in.readInt()); // Array to get the ids for. valueObject.setArrayIDS( new ArrayContentsRetriever(target), Array.getLength(target), Commands.OBJECT_CLASS); Commands.writeValue(out, valueObject, true); // Write it back as a value command. } catch (CommandException e) { throw e; // Throw it again. These we don't want to come up as an exception proxy. // These should end the thread. } catch (Throwable e) { sendException(e, valueObject, out); // Turn it into a exception proxy on the client. } finally { target = null; valueObject.set(); } break; case Commands.CALLBACK_DONE: try { if (connectionThread != null) { valueObject.set(); Commands.sendErrorCommand(out, Commands.UNKNOWN_COMMAND_SENT, valueObject); } else { try { Commands.readBackValue(in, valueObject, Commands.NO_TYPE_CHECK); if (valueObject.type == Commands.ARRAY_IDS) { // It is an array containing IDs, as it normally would be. valueSender.initialize(valueObject); Commands.readArray(in, valueObject.anInt, valueSender, valueObject, false); result = valueSender.getArray(); } else { result = getInvokableObject(valueObject); } doLoop = false; // We need to terminate and return result closeWhenDone = false; // Don't close, we will continue. } catch (CommandErrorException e) { // There was an command error on the other side. This means // connection still good, but don't continue the callback processing. doLoop = false; // We need to terminate and return result closeWhenDone = false; // Don't close, we will continue. throw e; // Let it go on out. } } } finally { valueObject.set(); valueSender.clear(); } break; case Commands.ERROR: try { // Got an error command. Don't know what to do but read the // value and simply print it out. Commands.readValue(in, valueObject); result = getInvokableObject(valueObject); System.out.println("Error sent to server: Result=" + result); // $NON-NLS-1$ } finally { valueObject.set(); } break; case Commands.EXPRESSION_TREE_COMMAND: try { processExpressionCommand(valueObject, valueSender); } finally { valueObject.set(); valueSender.clear(); } break; default: // Unknown command. We don't know how long it is, so we need to shut the connection // down. System.err.println("Error: Invalid cmd send to server: Cmd=" + cmd); // $NON-NLS-1$ doLoop = false; closeWhenDone = true; break; } } } catch (EOFException e) { // This is ok. It means that the connection on the other side was terminated. // So just accept this and go down. } catch (CommandException e) { throw e; } catch (SocketException e) { if (socket != null) throw new UnexpectedExceptionCommandException( false, e); // socket null means a valid close request } catch (Throwable e) { e.printStackTrace(); } finally { if (closeWhenDone) { try { for (Iterator itr = expressionProcessors.values().iterator(); itr.hasNext(); ) { ExpressionProcesserController exp = (ExpressionProcesserController) itr.next(); exp.close(); } } finally { expressionProcessors.clear(); } if (in != null) try { in.close(); } catch (Exception e) { } in = null; if (out != null) try { out.close(); } catch (Exception e) { } out = null; close(); } } if (closeWhenDone && connectionThread != null) server.removeConnectionThread(connectionThread); if (shutdown) server.requestShutdown(); return result; }
/** * Finds all classes inside the stated scope that implement TetradSerializable and serializes them * out to the getCurrentDirectory() directory. Abstract methods and interfaces are skipped over. * For all other classes C, it is assumed that C has a static constructor of the following form: * * <pre> * public static C serializableInstance() { * // Returns an instance of C. May be a mind-numbingly simple * // instance, no need to get fancy. * } * </pre> * * The instance returned may be mind-numbingly simple; there is no need to get fancy. It may * change over time. The point is to make sure that instances serialized out with earlier versions * load with the currentDirectory version. * * @throws RuntimeException if clazz cannot be serialized. This exception has an informative * message and wraps the originally thrown exception as root cause. */ public void serializeCurrentDirectory() throws RuntimeException { clearCurrentDirectory(); @SuppressWarnings("Convert2Diamond") Map<String, List<String>> classFields = new TreeMap<>(); // Get the classes that implement SerializationCanonicalizer. List classes = getAssignableClasses(new File(getSerializableScope()), TetradSerializable.class); System.out.println( "Serializing exemplars of instantiable TetradSerializable " + "in " + getSerializableScope() + "."); System.out.println("Writing serialized examplars to " + getCurrentDirectory()); int index = -1; for (Object aClass : classes) { Class clazz = (Class) aClass; if (TetradSerializableExcluded.class.isAssignableFrom(clazz)) { continue; } if (Modifier.isAbstract(clazz.getModifiers())) { continue; } if (Modifier.isInterface(clazz.getModifiers())) { continue; } int numFields = getNumNonSerialVersionUIDFields(clazz); if (numFields > 0 && serializableInstanceMethod(clazz) == null) { throw new RuntimeException( "Class " + clazz + " does not " + "\nhave a public static serializableInstance constructor."); } if (++index % 50 == 0) { System.out.println(index); } System.out.print("."); serializeClass(clazz, classFields); } try { File file = new File(getCurrentDirectory(), "class_fields.ser"); FileOutputStream out = new FileOutputStream(file); ObjectOutputStream objOut = new ObjectOutputStream(out); objOut.writeObject(classFields); out.close(); } catch (IOException e) { e.printStackTrace(); } System.out.println("\nFinished serializing exemplars."); }
public static void main(String[] args) throws Exception { System.out.println( "Checking that all known MBeans that are " + "NotificationBroadcasters have sane " + "MBeanInfo.getNotifications()"); System.out.println("Checking platform MBeans..."); checkPlatformMBeans(); URL codeBase = ClassLoader.getSystemResource("javax/management/MBeanServer.class"); if (codeBase == null) { throw new Exception("Could not determine codeBase for " + MBeanServer.class); } System.out.println(); System.out.println("Looking for standard MBeans..."); String[] classes = findStandardMBeans(codeBase); System.out.println("Testing standard MBeans..."); for (int i = 0; i < classes.length; i++) { String name = classes[i]; Class<?> c; try { c = Class.forName(name); } catch (Throwable e) { System.out.println(name + ": cannot load (not public?): " + e); continue; } if (!NotificationBroadcaster.class.isAssignableFrom(c)) { System.out.println(name + ": not a NotificationBroadcaster"); continue; } if (Modifier.isAbstract(c.getModifiers())) { System.out.println(name + ": abstract class"); continue; } NotificationBroadcaster mbean; Constructor<?> constr; try { constr = c.getConstructor(); } catch (Exception e) { System.out.println(name + ": no public no-arg constructor: " + e); continue; } try { mbean = (NotificationBroadcaster) constr.newInstance(); } catch (Exception e) { System.out.println(name + ": no-arg constructor failed: " + e); continue; } check(mbean); } System.out.println(); System.out.println("Testing some explicit cases..."); check(new RelationService(false)); /* We can't do this: check(new RequiredModelMBean()); because the Model MBean spec more or less forces us to use the names GENERIC and ATTRIBUTE_CHANGE for its standard notifs. */ checkRMIConnectorServer(); System.out.println(); if (!suspicious.isEmpty()) System.out.println("SUSPICIOUS CLASSES: " + suspicious); if (failed.isEmpty()) System.out.println("TEST PASSED"); else { System.out.println("TEST FAILED: " + failed); System.exit(1); } }