org.jgroups.util.Rsp Maven / Gradle / Ivy

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This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and JMS BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up with different versions on classes on the class path).

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package org.jgroups.util;

import org.jgroups.Address;


/**
 * Class that represents a response from a communication
 */
public class Rsp {
    /** Flag that represents whether the response was received */
    protected boolean       received;

    /** Flag that represents whether the sender of the response was suspected */
    protected boolean       suspected;

    /** If true, the sender (below) could not be reached, e.g. if a site was down (only used by RELAY2) */
    protected boolean       unreachable;

    /** The sender of this response */
    protected final Address sender;

    /** The value from the response */
    protected T             retval;

    /** If there was an exception, this field will contain it */
    protected Throwable     exception;


    public Rsp(Address sender) {
        this.sender=sender;
    }


    public Rsp(Address sender, T retval) {
        this.sender=sender;
        setValue(retval);
    }

    public Rsp(Address sender, Throwable t) {
        this.sender=sender;
        setException(t);
    }

    public boolean equals(Object obj) {
        if(!(obj instanceof Rsp))
            return false;
        Rsp other=(Rsp)obj;
        if(sender != null)
            return sender.equals(other.sender);
        return other.sender == null;
    }

    public int hashCode() {
        return sender != null? sender.hashCode() : 0;
    }

    public T getValue() {
        return retval;
    }

    public void setValue(T val) {
        this.retval=val;
        setReceived();
        exception=null;
    }

    public boolean hasException() {
        return exception != null;
    }

    public Throwable getException() {
        return exception;
    }

    public void setException(Throwable t) {
        if(t != null) {
            this.exception=t;
            setReceived();
            retval=null;
        }
    }

    public Address getSender() {
        return sender;
    }

    public boolean wasReceived() {
        return received;
    }

    public void setReceived() {
        received=true;
    }

    public boolean wasSuspected() {
        return suspected;
    }

    public boolean setSuspected() {
        boolean changed=!suspected;
        suspected=true;
        return changed;
    }

    public boolean wasUnreachable() {
        return unreachable;
    }

    public boolean setUnreachable() {
        boolean changed=!unreachable;
        unreachable=true;
        return changed;
    }


    public String toString() {
        StringBuilder sb=new StringBuilder();
        sb.append("sender=").append(sender);
        if(retval != null)
            sb.append(", retval=").append(retval);
        if(exception != null)
            sb.append(", exception=").append(exception);
        sb.append(", received=").append(received).append(", suspected=").append(suspected);
        if(unreachable)
            sb.append(" (unreachable)");
        return sb.toString();
    }
}