org.jgroups.protocols.SIZE 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.protocols;

import org.jgroups.Address;
import org.jgroups.Event;
import org.jgroups.Message;
import org.jgroups.annotations.Property;
import org.jgroups.stack.Protocol;
import org.jgroups.util.MessageBatch;
import org.jgroups.util.Util;

import java.util.ArrayList;
import java.util.List;


/**
 * Protocol which prints out the real size of a message. Don't use this layer in
 * a production stack since the costs are high (just for debugging).
 * 
 * @author Bela Ban June 13 2001
 */
public class SIZE extends Protocol {
    protected final List members=new ArrayList<>();
    @Property protected boolean   print_msg=false;
    @Property protected boolean   raw_buffer=false; // just print the payload size of the message

    /** Min size in bytes above which msgs should be printed */
    protected @Property long      min_size;

    protected Address             local_addr;


    public Object up(Event evt) {
        switch(evt.getType()) {
            case Event.MSG:
                if(log.isTraceEnabled()) {
                    Message msg=(Message)evt.getArg();
                    long size=raw_buffer? msg.getLength() : msg.size();
                    if(size >= min_size) {
                        StringBuilder sb=new StringBuilder(local_addr + ".up(): size of message buffer=");
                        sb.append(Util.printBytes(size)).append(", " + numHeaders(msg) + " headers");
                        if(print_msg)
                            sb.append(", headers=" + msg.printHeaders());
                        log.trace(sb);
                    }
                }
                break;
        }
        return up_prot.up(evt);            // pass up to the layer above us
    }


    public void up(MessageBatch batch) {
        if(log.isTraceEnabled()) {
            long size=raw_buffer? batch.length() : batch.totalSize();
            if(size >= min_size) {
                StringBuilder sb=new StringBuilder(local_addr + ".up(): size of message batch=");
                sb.append(Util.printBytes(size)).append(", " + batch.size() + " messages, " + numHeaders(batch) + " headers");
                log.trace(sb);
            }
        }
        up_prot.up(batch);
    }

    public Object down(Event evt) {
        switch(evt.getType()) {
            case Event.MSG:
                if(log.isTraceEnabled()) {
                    Message msg=(Message)evt.getArg();
                    long size=raw_buffer? msg.getLength() : msg.size();
                    if(size >= min_size) {
                        StringBuilder sb=new StringBuilder(local_addr + ".down(): size of message buffer=");
                        sb.append(Util.printBytes(size)).append(", " + numHeaders(msg) + " headers");
                        if(print_msg)
                            sb.append(", headers=" + msg.printHeaders());
                        log.trace(sb);
                    }
                }
                break;

            case Event.SET_LOCAL_ADDRESS:
                local_addr=(Address)evt.getArg();
                break;
        }

        return down_prot.down(evt);          // Pass on to the layer below us
    }


    protected static int numHeaders(Message msg) {
        return msg == null? 0 : msg.getNumHeaders();
    }

    protected static int numHeaders(MessageBatch batch) {
        int retval=0;
        for(Message msg: batch)
            retval+=numHeaders(msg);
        return retval;
    }

}