com.sun.xml.ws.api.pipe.NextAction Maven / Gradle / Ivy
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package com.sun.xml.ws.api.pipe;
import com.sun.xml.ws.api.message.Packet;
/**
* Indicates what shall happen after {@link Tube#processRequest(Packet)} or
* {@link Tube#processResponse(Packet)} returns.
*
*
* To allow reuse of this object, this class is mutable.
*
* @author Kohsuke Kawaguchi
*/
public final class NextAction {
int kind;
Tube next;
Packet packet;
/**
* Really either {@link RuntimeException} or {@link Error}.
*/
Throwable throwable;
// public enum Kind { INVOKE, INVOKE_AND_FORGET, RETURN, SUSPEND }
static final int INVOKE = 0;
static final int INVOKE_AND_FORGET = 1;
static final int RETURN = 2;
static final int THROW = 3;
static final int SUSPEND = 4;
private void set(int k, Tube v, Packet p, Throwable t) {
this.kind = k;
this.next = v;
this.packet = p;
this.throwable = t;
}
/**
* Indicates that the next action should be to
* invoke the next tube's {@link Tube#processRequest(Packet)},
* then later invoke the current tube's {@link Tube#processResponse(Packet)}
* with the response packet.
*/
public void invoke(Tube next, Packet p) {
set(INVOKE, next, p, null);
}
/**
* Indicates that the next action should be to
* invoke the next tube's {@link Tube#processRequest(Packet)},
* but the current tube doesn't want to receive the response packet to
* its {@link Tube#processResponse(Packet)}.
*/
public void invokeAndForget(Tube next, Packet p) {
set(INVOKE_AND_FORGET, next, p, null);
}
/**
* Indicates that the next action is to flip the processing direction
* and starts response processing.
*/
public void returnWith( Packet response ) {
set(RETURN, null, response, null);
}
/**
* Indicates that the next action is to flip the processing direction
* and starts exception processing.
*
* @param t
* Either {@link RuntimeException} or {@link Error}, but defined to
* take {@link Throwable} because {@link Tube#processException(Throwable)}
* takes {@link Throwable}.
*/
public void throwException(Throwable t) {
assert t instanceof RuntimeException || t instanceof Error;
set(THROW,null,null,t);
}
/**
* Indicates that the fiber should be suspended.
* Once {@link Fiber#resume(Packet) resumed}, return the response processing.
*/
public void suspend() {
set(SUSPEND, null, null, null);
}
/**
* Indicates that the fiber should be suspended.
* Once {@link Fiber#resume(Packet) resumed}, resume with the
* {@link Tube#processRequest(Packet)} on the given next tube.
*/
public void suspend(Tube next) {
set(SUSPEND, next, null, null);
}
/**
* Dumps the contents to assist debugging.
*/
public String toString() {
StringBuilder buf = new StringBuilder();
buf.append(super.toString()).append(" [");
buf.append("kind=").append(getKindString()).append(',');
buf.append("next=").append(next).append(',');
buf.append("packet=").append(packet).append(',');
buf.append("throwable=").append(throwable).append(']');
return buf.toString();
}
/**
* Returns {@link #kind} in a human readable string, to assist debugging.
*/
public String getKindString() {
switch(kind) {
case INVOKE: return "INVOKE";
case INVOKE_AND_FORGET: return "INVOKE_AND_FORGET";
case RETURN: return "RETURN";
case THROW: return "THROW";
case SUSPEND: return "SUSPEND";
default: throw new AssertionError(kind);
}
}
}