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

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This artifact provides a single jar that contains all classes required to use remote Jakarta Enterprise Beans and Jakarta Messaging, including all dependencies. It is intended for use by those not using maven, maven users should just import the Jakarta Enterprise Beans and Jakarta Messaging 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;

/**
 * Encapsulates the result of a state transfer. When buffer is set, then this is the result of a state transfer with
 * STATE_TRANSFER. When exception is non-null, then an exception occurred. When both fields are null, then the
 * (streaming) state transfer was successful.
 * @author Bela Ban
 * @since 3.0
 */
public class StateTransferResult {
    protected final byte[]    buffer;    // used with STATE_TRANSFER
    protected final Throwable exception; // when an exception occurred

    
    public StateTransferResult() {
        buffer=null;
        exception=null;
    }

    public StateTransferResult(byte[] buffer) {
        this.buffer=buffer;
        this.exception=null;
    }

    public StateTransferResult(Throwable t) {
        this.exception=t;
        this.buffer=null;
    }

    public boolean   hasBuffer()      {return buffer    != null && buffer.length > 0;}
    public boolean   hasException()   {return exception != null;}
    public byte[]    getBuffer()      {return buffer;}
    public Throwable getException()   {return exception;}

    public String toString() {
        if(buffer != null)
            return Util.printBytes(buffer.length);
        else if(exception != null)
            return exception.toString();
        return "OK";
    }



}