public void ping(IbisIdentifier ibis) throws IOException {
long start = System.currentTimeMillis();
Connection connection =
new Connection(ibis, CONNECTION_TIMEOUT, true, socketFactory, Protocol.VIRTUAL_PORT);
connection.out().writeByte(Protocol.MAGIC_BYTE);
connection.out().writeByte(Protocol.OPCODE_PING);
connection.getAndCheckReply();
IbisIdentifier result = new IbisIdentifier(connection.in());
connection.close();
if (!result.equals(ibis)) {
throw new IOException("tried to ping " + ibis + ", reached " + result + " instead");
}
if (statistics != null) {
statistics.add(
Protocol.OPCODE_PING,
System.currentTimeMillis() - start,
connection.read(),
connection.written(),
false);
}
}
void sendLeave(VirtualSocketAddress address) {
if (address.equals(serverSocket.getLocalSocketAddress())) {
// do not connect to self
return;
}
try {
long start = System.currentTimeMillis();
Connection connection =
new Connection(address, LEAVE_CONNECTION_TIMEOUT, true, socketFactory);
connection.out().writeByte(Protocol.MAGIC_BYTE);
connection.out().writeByte(Protocol.OPCODE_LEAVE);
registry.getIbisIdentifier().writeTo(connection.out());
connection.getAndCheckReply();
connection.close();
if (statistics != null) {
statistics.add(
Protocol.OPCODE_LEAVE,
System.currentTimeMillis() - start,
connection.read(),
connection.written(),
false);
}
} catch (IOException e) {
logger.debug(serverSocket.getLocalSocketAddress() + " could not send leave to " + address);
}
}
public void sendSignals(String signal, IbisIdentifier[] ibises) throws IOException {
String errorMessage = null;
for (IbisIdentifier ibis : ibises) {
try {
long start = System.currentTimeMillis();
Connection connection =
new Connection(ibis, CONNECTION_TIMEOUT, true, socketFactory, Protocol.VIRTUAL_PORT);
connection.out().writeByte(Protocol.MAGIC_BYTE);
connection.out().writeByte(Protocol.OPCODE_SIGNAL);
registry.getIbisIdentifier().writeTo(connection.out());
connection.out().writeUTF(signal);
connection.getAndCheckReply();
connection.close();
if (statistics != null) {
statistics.add(
Protocol.OPCODE_SIGNAL,
System.currentTimeMillis() - start,
connection.read(),
connection.written(),
false);
}
} catch (IOException e) {
logger.error("could not send signal to " + ibis);
if (errorMessage == null) {
errorMessage = "could not send signal to: " + ibis;
} else {
errorMessage += ", " + ibis;
}
}
}
if (errorMessage != null) {
throw new IOException(errorMessage);
}
}
public void gossip() {
VirtualSocketAddress address = arrg.getRandomMember();
if (address == null || address.equals(serverSocket.getLocalSocketAddress())) {
logger.debug("noone to gossip with, or (not) gossiping with self");
return;
}
try {
long start = System.currentTimeMillis();
Connection connection = new Connection(address, CONNECTION_TIMEOUT, true, socketFactory);
connection.out().writeByte(Protocol.MAGIC_BYTE);
connection.out().writeByte(Protocol.OPCODE_GOSSIP);
registry.getIbisIdentifier().writeTo(connection.out());
pool.writeGossipData(connection.out(), gossipSize);
elections.writeGossipData(connection.out());
connection.getAndCheckReply();
pool.readGossipData(connection.in());
elections.readGossipData(connection.in());
connection.close();
if (statistics != null) {
statistics.add(
Protocol.OPCODE_GOSSIP,
System.currentTimeMillis() - start,
connection.read(),
connection.written(),
false);
}
} catch (IOException e) {
logger.debug("could not gossip with " + address, e);
}
}
public void run() {
Connection connection = null;
try {
logger.debug("accepting connection");
connection = new Connection(serverSocket);
logger.debug("connection accepted");
} catch (IOException e) {
if (registry.isStopped()) {
threadEnded();
return;
}
logger.error("Accept failed, waiting a second, will retry", e);
// wait a bit
try {
Thread.sleep(1000);
} catch (InterruptedException e1) {
// IGNORE
}
}
// create new thread for next connection
createThread();
if (connection == null) {
threadEnded();
return;
}
long start = System.currentTimeMillis();
byte opcode = 0;
try {
byte magic = connection.in().readByte();
if (magic != Protocol.MAGIC_BYTE) {
throw new IOException("Invalid header byte in accepting connection");
}
opcode = connection.in().readByte();
if (logger.isDebugEnabled()) {
logger.debug("got request, opcode = " + Protocol.opcodeString(opcode));
}
switch (opcode) {
case Protocol.OPCODE_ARRG_GOSSIP:
handleArrgGossip(connection);
break;
case Protocol.OPCODE_SIGNAL:
handleSignal(connection);
break;
case Protocol.OPCODE_LEAVE:
handleLeave(connection);
break;
case Protocol.OPCODE_GOSSIP:
handleGossip(connection);
break;
case Protocol.OPCODE_PING:
handlePing(connection);
break;
default:
logger.error("unknown opcode: " + opcode);
}
} catch (IOException e) {
logger.error("error on handling connection", e);
} finally {
connection.close();
}
logger.debug("done handling request");
if (statistics != null) {
statistics.add(
opcode,
System.currentTimeMillis() - start,
connection.read(),
connection.written(),
true);
}
threadEnded();
}
private void gossip(VirtualSocketAddress victim, int timeout, boolean fillTimeout)
throws IOException {
long start = System.currentTimeMillis();
if (victim == null) {
logger.debug("no victim specified");
return;
}
if (victim.equals(self.getAddress())) {
logger.debug("not gossiping with outselves");
return;
}
logger.debug("gossiping with " + victim);
ARRGCacheEntry[] sendEntries = cache.getRandomEntries(GOSSIP_SIZE, true);
Connection connection = null;
try {
connection = new Connection(victim, timeout, fillTimeout, socketFactory);
// header
connection.out().writeByte(Protocol.MAGIC_BYTE);
connection.out().writeByte(Protocol.OPCODE_ARRG_GOSSIP);
connection.out().writeUTF(poolName);
// data
self.writeTo(connection.out());
connection.out().writeInt(sendEntries.length);
for (ARRGCacheEntry entry : sendEntries) {
entry.writeTo(connection.out());
}
connection.getAndCheckReply();
ARRGCacheEntry peerEntry = new ARRGCacheEntry(connection.in());
int receiveCount = connection.in().readInt();
ARRGCacheEntry[] receivedEntries = new ARRGCacheEntry[receiveCount];
for (int i = 0; i < receiveCount; i++) {
receivedEntries[i] = new ARRGCacheEntry(connection.in());
}
connection.close();
cache.add(peerEntry);
cache.add(receivedEntries);
resetLastGossip();
if (statistics != null) {
statistics.add(
Protocol.OPCODE_ARRG_GOSSIP,
System.currentTimeMillis() - start,
connection.read(),
connection.written(),
false);
}
} finally {
if (connection != null) {
connection.close();
}
}
}