net.openhft.chronicle.network.connection

Class FatalFailureConnectionStrategy

java.lang.Object

net.openhft.chronicle.network.connection.FatalFailureConnectionStrategy

All Implemented Interfaces:

ConnectionStrategy, net.openhft.chronicle.wire.Marshallable, net.openhft.chronicle.wire.ReadMarshallable, net.openhft.chronicle.wire.WriteMarshallable, net.openhft.chronicle.wire.WriteValue

public class FatalFailureConnectionStrategy
extends Object
implements ConnectionStrategy

Author:

Rob Austin. The main functionality would be exactly same as C#: - on any disconnect event, Chronicle Client would go through the list of hosts to connect for a pre-configured number of times (default connection retries with each host = 3). - A fatal failure event is raised if the connection is not established during any of these attempts. - If connection is successful with any hosts in the list, then fatal failure is not raised, and connection retries is set to zero (so that any future disconnection event then starts its own “3 retries for each host”).

Couple of examples are given below. The assumption is that there are three servers MAIN, DR1 and DR2. The 1. Currently the client is connected with DR1. A disconnect with DR1 occurs, and then the client tries connecting to DR2, MAIN and DR1. It attempts this for a preconfigured number of times (e.g. 3 times). So for example, the following events occur: --a. Connection attempt no 1 with DR2: failed --b. Connection attempt no 1 with MAIN: failed --c. Connection attempt no 1 with DR1: failed --d. Connection attempt no 2 with DR2: succeeded. No fatal failure event is raised. 2. Now the client is on DR2 and a disconnect with DR2 occurs. Following events occur --a. Connection attempt no 1 with MAIN: failed --b. Connection attempt no 1 with DR1: failed --c. Connection attempt no 1 with DR2: failed --d. Connection attempt no 2 with MAIN: failed --e. Connection attempt no 2 with DR1: failed --f. Connection attempt no 2 with DR2: failed --g. Connection attempt no 3 with MAIN: failed --h. Connection attempt no 3 with DR1: failed --i. Connection attempt no 3 with DR2: failed => Attempt 3 finished. Fatal Failure is raised

Field Summary

Fields inherited from interface net.openhft.chronicle.wire.WriteMarshallable

EMPTY

Fields inherited from interface net.openhft.chronicle.wire.ReadMarshallable

DISCARD

Constructor Summary

Constructors

Constructor and Description
FatalFailureConnectionStrategy(int attempts)

Method Summary

Modifier and Type	Method and Description
SocketChannel	connect(String name, SocketAddressSupplier socketAddressSupplier, NetworkStatsListener<? extends NetworkContext> networkStatsListener, boolean didLogIn, FatalFailureMonitor fatalFailureMonitor)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface net.openhft.chronicle.network.ConnectionStrategy

openSocketChannel, socketChannel

Methods inherited from interface net.openhft.chronicle.wire.Marshallable

$equals, $fieldInfos, $hashCode, $toString, copyFrom, copyTo, deepCopy, fromFile, fromFile, fromFileAsMap, fromFileAsMap, fromHexString, fromString, getField, mergeToMap, readMarshallable, setField, streamFromFile, streamFromFile, writeMarshallable

Methods inherited from interface net.openhft.chronicle.wire.WriteMarshallable

writeValue

Constructor Detail

FatalFailureConnectionStrategy

public FatalFailureConnectionStrategy(int attempts)

Parameters:

attempts - the number of attempts before a onFatalFailure() reported

Method Detail

connect

@Nullable
public SocketChannel connect(@NotNull
                                       String name,
                                       @NotNull
                                       SocketAddressSupplier socketAddressSupplier,
                                       @Nullable
                                       NetworkStatsListener<? extends NetworkContext> networkStatsListener,
                                       boolean didLogIn,
                                       @Nullable
                                       FatalFailureMonitor fatalFailureMonitor)
                                throws InterruptedException

Specified by:

connect in interface ConnectionStrategy

Parameters:

name - the name of the connection, only used for logging

didLogIn - was the last attempt successfull, was a login established

Returns:

Throws:

InterruptedException