org.jgroups.protocols.UnicastHeader3 Maven / Gradle / Ivy
Go to download
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).
package org.jgroups.protocols;
import org.jgroups.Global;
import org.jgroups.Header;
import org.jgroups.util.Bits;
import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;
import java.util.function.Supplier;
/**
* Moved out of {@link UNICAST3} into separate class. Used to attach/remove headers (e.g. seqnos) from {@link UNICAST3}.
* @author Bela Ban
* @since 4.0
*/
public class UnicastHeader3 extends Header {
public static final byte DATA = 0;
public static final byte ACK = 1;
public static final byte SEND_FIRST_SEQNO = 2;
public static final byte XMIT_REQ = 3; // SeqnoList of missing message is in the message's payload
public static final byte CLOSE = 4;
byte type;
long seqno; // DATA and ACK
short conn_id; // DATA and CLOSE
boolean first; // DATA
int timestamp; // SEND_FIRST_SEQNO and ACK
public UnicastHeader3() {} // used for externalization
protected UnicastHeader3(byte type) {
this.type=type;
}
protected UnicastHeader3(byte type, long seqno) {
this.type=type;
this.seqno=seqno;
}
protected UnicastHeader3(byte type, long seqno, short conn_id, boolean first) {
this.type=type;
this.seqno=seqno;
this.conn_id=conn_id;
this.first=first;
}
public short getMagicId() {return 82;}
public Supplier create() {return UnicastHeader3::new;}
public static UnicastHeader3 createDataHeader(long seqno, short conn_id, boolean first) {
return new UnicastHeader3(DATA, seqno, conn_id, first);
}
public static UnicastHeader3 createAckHeader(long seqno, short conn_id, int timestamp) {
return new UnicastHeader3(ACK, seqno, conn_id, false).timestamp(timestamp);
}
public static UnicastHeader3 createSendFirstSeqnoHeader(int timestamp) {
return new UnicastHeader3(SEND_FIRST_SEQNO).timestamp(timestamp);
}
public static UnicastHeader3 createXmitReqHeader() {
return new UnicastHeader3(XMIT_REQ);
}
public static UnicastHeader3 createCloseHeader(short conn_id) {
return new UnicastHeader3(CLOSE, 0, conn_id, false);
}
public byte type() {return type;}
public long seqno() {return seqno;}
public short connId() {return conn_id;}
public boolean first() {return first;}
public int timestamp() {return timestamp;}
public UnicastHeader3 timestamp(int ts) {timestamp=ts; return this;}
public String toString() {
StringBuilder sb=new StringBuilder();
sb.append(type2Str(type)).append(", seqno=").append(seqno);
if(conn_id != 0) sb.append(", conn_id=").append(conn_id);
if(first) sb.append(", first");
if(timestamp != 0)
sb.append(", ts=").append(timestamp);
return sb.toString();
}
public static String type2Str(byte t) {
switch(t) {
case DATA: return "DATA";
case ACK: return "ACK";
case SEND_FIRST_SEQNO: return "SEND_FIRST_SEQNO";
case XMIT_REQ: return "XMIT_REQ";
case CLOSE: return "CLOSE";
default: return "";
}
}
public final int serializedSize() {
int retval=Global.BYTE_SIZE; // type
switch(type) {
case DATA:
retval+=Bits.size(seqno) // seqno
+ Global.SHORT_SIZE // conn_id
+ Global.BYTE_SIZE; // first
break;
case ACK:
retval+=Bits.size(seqno)
+ Global.SHORT_SIZE // conn_id
+ Bits.size(timestamp);
break;
case SEND_FIRST_SEQNO:
retval+=Bits.size(timestamp);
break;
case XMIT_REQ:
break;
case CLOSE:
retval+=Global.SHORT_SIZE; // conn-id
break;
}
return retval;
}
public UnicastHeader3 copy() {
return new UnicastHeader3(type, seqno, conn_id, first);
}
/**
* The following types and fields are serialized:
*
* | DATA | seqno | conn_id | first |
* | ACK | seqno | timestamp |
* | SEND_FIRST_SEQNO | timestamp |
* | CLOSE | conn_id |
*
*/
@Override
public void writeTo(DataOutput out) throws IOException {
out.writeByte(type);
switch(type) {
case DATA:
Bits.writeLongCompressed(seqno, out);
out.writeShort(conn_id);
out.writeBoolean(first);
break;
case ACK:
Bits.writeLongCompressed(seqno, out);
out.writeShort(conn_id);
Bits.writeIntCompressed(timestamp, out);
break;
case SEND_FIRST_SEQNO:
Bits.writeIntCompressed(timestamp, out);
break;
case XMIT_REQ:
break;
case CLOSE:
out.writeShort(conn_id);
break;
}
}
@Override
public void readFrom(DataInput in) throws IOException {
type=in.readByte();
switch(type) {
case DATA:
seqno=Bits.readLongCompressed(in);
conn_id=in.readShort();
first=in.readBoolean();
break;
case ACK:
seqno=Bits.readLongCompressed(in);
conn_id=in.readShort();
timestamp=Bits.readIntCompressed(in);
break;
case SEND_FIRST_SEQNO:
timestamp=Bits.readIntCompressed(in);
break;
case XMIT_REQ:
break;
case CLOSE:
conn_id=in.readShort();
break;
}
}
}