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/*
* Copyright (c) 1997, 2019 Oracle and/or its affiliates. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Distribution License v. 1.0, which is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
package com.sun.xml.ws.handler;
import com.sun.xml.ws.api.WSBinding;
import javax.xml.ws.ProtocolException;
import javax.xml.ws.handler.Handler;
import javax.xml.ws.handler.MessageContext;
import java.util.ArrayList;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
* @author WS Development Team
*/
abstract class HandlerProcessor {
boolean isClient;
static final Logger logger = Logger.getLogger(
com.sun.xml.ws.util.Constants.LoggingDomain + ".handler");
// need request or response for Handle interface
public enum RequestOrResponse {
REQUEST, RESPONSE }
public enum Direction {
OUTBOUND, INBOUND }
private List handlers; // may be logical/soap mixed
WSBinding binding;
private int index = -1;
private HandlerTube owner;
/**
* The handlers that are passed in will be sorted into
* logical and soap handlers. During this sorting, the
* understood headers are also obtained from any soap
* handlers.
*
* @param chain A list of handler objects, which can
* be protocol or logical handlers.
*/
protected HandlerProcessor(HandlerTube owner, WSBinding binding, List chain) {
this.owner = owner;
if (chain == null) { // should only happen in testing
chain = new ArrayList();
}
handlers = chain;
this.binding = binding;
}
/**
* Gives index of the handler in the chain to know what handlers in the chain
* are invoked
*/
int getIndex() {
return index;
}
/**
* This is called when a handler returns false or throws a RuntimeException
*/
void setIndex(int i) {
index = i;
}
/**
* TODO: Just putting thoughts,
* Current contract: This is Called during Request Processing.
* return true, if all handlers in the chain return true
* Current Pipe can call nextPipe.process();
* return false, One of the handlers has returned false or thrown a
* RuntimeException. Remedy Actions taken:
* 1) In this case, The processor will setIndex()to track what
* handlers are invoked until that point.
* 2) Previously invoked handlers are again invoked (handleMessage()
* or handleFault()) to take remedy action.
* CurrentPipe should NOT call nextPipe.process()
* While closing handlers, check getIndex() to get the invoked
* handlers.
* @throws RuntimeException this happens when a RuntimeException occurs during
* handleMessage during Request processing or
* during remedy action 2)
* CurrentPipe should NOT call nextPipe.process() and throw the
* exception to the previous Pipe
* While closing handlers, check getIndex() to get the invoked
* handlers.
*/
public boolean callHandlersRequest(Direction direction,
C context,
boolean responseExpected) {
setDirection(direction, context);
boolean result;
// call handlers
try {
if (direction == Direction.OUTBOUND) {
result = callHandleMessage(context, 0, handlers.size() - 1);
} else {
result = callHandleMessage(context, handlers.size() - 1, 0);
}
} catch (ProtocolException pe) {
logger.log(Level.FINER, "exception in handler chain", pe);
if (responseExpected) {
//insert fault message if its not a fault message
insertFaultMessage(context, pe);
// reverse direction
reverseDirection(direction, context);
//Set handleFault so that cousinTube is aware of fault
setHandleFaultProperty();
// call handle fault
if (direction == Direction.OUTBOUND) {
callHandleFault(context, getIndex() - 1, 0);
} else {
callHandleFault(context, getIndex() + 1, handlers.size() - 1);
}
return false;
}
throw pe;
} catch (RuntimeException re) {
logger.log(Level.FINER, "exception in handler chain", re);
throw re;
}
if (!result) {
if (responseExpected) {
// reverse direction
reverseDirection(direction, context);
// call handle message
if (direction == Direction.OUTBOUND) {
callHandleMessageReverse(context, getIndex() - 1, 0);
} else {
callHandleMessageReverse(context, getIndex() + 1, handlers.size() - 1);
}
} else {
// Set handleFalse so that cousinTube is aware of false processing
// Oneway, dispatch the message
// cousinTube should n't call handleMessage() anymore.
setHandleFalseProperty();
}
return false;
}
return result;
}
/**
* TODO: Just putting thoughts,
* Current contract: This is Called during Response Processing.
* Runs all handlers until handle returns false or throws a RuntimeException
* CurrentPipe should close all the handlers in the chain.
* throw RuntimeException, this happens when a RuntimeException occurs during
* normal Response processing or remedy action 2) taken
* during callHandlersRequest().
* CurrentPipe should close all the handlers in the chain. *
*/
public void callHandlersResponse(Direction direction,
C context, boolean isFault) {
setDirection(direction, context);
try {
if (isFault) {
// call handleFault on handlers
if (direction == Direction.OUTBOUND) {
callHandleFault(context, 0, handlers.size() - 1);
} else {
callHandleFault(context, handlers.size() - 1, 0);
}
} else {
// call handleMessage on handlers
if (direction == Direction.OUTBOUND) {
callHandleMessageReverse(context, 0, handlers.size() - 1);
} else {
callHandleMessageReverse(context, handlers.size() - 1, 0);
}
}
} catch (RuntimeException re) {
logger.log(Level.FINER, "exception in handler chain", re);
throw re;
}
}
/**
* Reverses the Message Direction.
* MessageContext.MESSAGE_OUTBOUND_PROPERTY is changed.
*/
private void reverseDirection(Direction origDirection, C context) {
if (origDirection == Direction.OUTBOUND) {
context.put(MessageContext.MESSAGE_OUTBOUND_PROPERTY, false);
} else {
context.put(MessageContext.MESSAGE_OUTBOUND_PROPERTY, true);
}
}
/**
* Sets the Message Direction.
* MessageContext.MESSAGE_OUTBOUND_PROPERTY is changed.
*/
private void setDirection(Direction direction, C context) {
if (direction == Direction.OUTBOUND) {
context.put(MessageContext.MESSAGE_OUTBOUND_PROPERTY, true);
} else {
context.put(MessageContext.MESSAGE_OUTBOUND_PROPERTY, false);
}
}
/**
* When this property is set HandlerPipes can call handleFault() on the
* message
*/
private void setHandleFaultProperty() {
owner.setHandleFault();
}
/**
* When this property is set HandlerPipes will not call
* handleMessage() during Response processing.
*/
private void setHandleFalseProperty() {
owner.setHandleFalse();
}
/**
* When a ProtocolException is thrown, this is called.
* If it's XML/HTTP Binding, clear the the message
* If its SOAP/HTTP Binding, put right SOAP Fault version
*/
abstract void insertFaultMessage(C context,
ProtocolException exception);
/*
* Calls handleMessage on the handlers. Indices are
* inclusive. Exceptions get passed up the chain, and an
* exception or return of 'false' ends processing.
*/
private boolean callHandleMessage(C context, int start, int end) {
/* Do we need this check?
if (handlers.isEmpty() ||
start == -1 ||
start == handlers.size()) {
return false;
}
*/
int i = start;
try {
if (start > end) {
while (i >= end) {
if (!handlers.get(i).handleMessage(context)) {
setIndex(i);
return false;
}
i--;
}
} else {
while (i <= end) {
if (!handlers.get(i).handleMessage(context)) {
setIndex(i);
return false;
}
i++;
}
}
} catch (RuntimeException e) {
setIndex(i);
throw e;
}
return true;
}
/*
* Calls handleMessage on the handlers. Indices are
* inclusive. Exceptions get passed up the chain, and an
* exception (or)
* return of 'false' calls addHandleFalseProperty(context) and
* ends processing.
* setIndex() is not called.
*
*/
private boolean callHandleMessageReverse(C context, int start, int end) {
if (handlers.isEmpty() ||
start == -1 ||
start == handlers.size()) {
return false;
}
int i = start;
if (start > end) {
while (i >= end) {
if (!handlers.get(i).handleMessage(context)) {
// Set handleFalse so that cousinTube is aware of false processing
setHandleFalseProperty();
return false;
}
i--;
}
} else {
while (i <= end) {
if (!handlers.get(i).handleMessage(context)) {
// Set handleFalse so that cousinTube is aware of false processing
setHandleFalseProperty();
return false;
}
i++;
}
}
return true;
}
/*
* Calls handleFault on the handlers. Indices are
* inclusive. Exceptions get passed up the chain, and an
* exception or return of 'false' ends processing.
*/
private boolean callHandleFault(C context, int start, int end) {
if (handlers.isEmpty() ||
start == -1 ||
start == handlers.size()) {
return false;
}
int i = start;
if (start > end) {
try {
while (i >= end) {
if (!handlers.get(i).handleFault(context)) {
return false;
}
i--;
}
} catch (RuntimeException re) {
logger.log(Level.FINER,
"exception in handler chain", re);
throw re;
}
} else {
try {
while (i <= end) {
if (!handlers.get(i).handleFault(context)) {
return false;
}
i++;
}
} catch (RuntimeException re) {
logger.log(Level.FINER,
"exception in handler chain", re);
throw re;
}
}
return true;
}
/**
* Calls close on the handlers from the starting
* index through the ending index (inclusive). Made indices
* inclusive to allow both directions more easily.
*/
void closeHandlers(MessageContext context, int start, int end) {
if (handlers.isEmpty() ||
start == -1) {
return;
}
if (start > end) {
for (int i = start; i >= end; i--) {
try {
handlers.get(i).close(context);
} catch (RuntimeException re) {
logger.log(Level.INFO,
"Exception ignored during close", re);
}
}
} else {
for (int i = start; i <= end; i++) {
try {
handlers.get(i).close(context);
} catch (RuntimeException re) {
logger.log(Level.INFO,
"Exception ignored during close", re);
}
}
}
}
}
