net.openhft.chronicle.network.connection

Class FatalFailureConnectionStrategy

java.lang.Object

net.openhft.chronicle.wire.AbstractCommonMarshallable

net.openhft.chronicle.wire.SelfDescribingMarshallable

net.openhft.chronicle.wire.AbstractMarshallableCfg

net.openhft.chronicle.network.connection.AbstractConnectionStrategy

net.openhft.chronicle.network.connection.FatalFailureConnectionStrategy

All Implemented Interfaces:

Closeable, AutoCloseable, net.openhft.chronicle.bytes.BytesMarshallable, net.openhft.chronicle.bytes.CommonMarshallable, net.openhft.chronicle.bytes.ReadBytesMarshallable, net.openhft.chronicle.bytes.WriteBytesMarshallable, net.openhft.chronicle.core.io.Resettable, 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 AbstractConnectionStrategy

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 implies: Attempt 3 finished. Fatal Failure is raised

Field Summary

Fields inherited from class net.openhft.chronicle.network.connection.AbstractConnectionStrategy

clientConnectionMonitor, localBindingNetworkInterface, localBindingProtocolFamily, localSocketBindingHost, localSocketBindingPort, tcpBufferSize

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, boolean blocking)

Method Summary

Modifier and Type	Method and Description
ClientConnectionMonitor	clientConnectionMonitor()
FatalFailureConnectionStrategy	clientConnectionMonitor(ClientConnectionMonitor fatalFailureMonitor)
@Nullable ChronicleSocketChannel	connect(@NotNull String name, @NotNull SocketAddressSupplier socketAddressSupplier, boolean didLogIn, @Nullable FatalFailureMonitor fatalFailureMonitor) Connects and returns a new SocketChannel.

Methods inherited from class net.openhft.chronicle.network.connection.AbstractConnectionStrategy

close, defaultMaxPauseSec, defaultMinPauseSec, isClosed, localBindingNetworkInterface, localBindingProtocolFamily, localSocketBinding, localSocketBindingHost, localSocketBindingPort, open

Methods inherited from class net.openhft.chronicle.wire.AbstractMarshallableCfg

readMarshallable, unexpectedField, writeMarshallable

Methods inherited from class net.openhft.chronicle.wire.SelfDescribingMarshallable

usesSelfDescribingMessage

Methods inherited from class net.openhft.chronicle.wire.AbstractCommonMarshallable

equals, hashCode, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

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

maxPauseSec, minPauseSec, openSocketChannel, openSocketChannel, pauseBeforeReconnect, pauseMillisBeforeReconnect, socketChannel, throwExceptionIfClosed

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

$equals, $fieldInfoMap, $fieldInfos, $hashCode, $toString, className, copyTo, deepCopy, fromFile, fromFile, fromString, fromString, fromString, getField, getLongField, mergeToMap, readMarshallable, reset, setField, setLongField, streamFromFile, streamFromFile, writeMarshallable

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

binaryLengthLength, writeValue

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

unexpectedField

Methods inherited from interface net.openhft.chronicle.bytes.CommonMarshallable

usesSelfDescribingMessage

Methods inherited from interface net.openhft.chronicle.bytes.BytesMarshallable

$toString, readMarshallable, writeMarshallable

Constructor Detail

FatalFailureConnectionStrategy

public FatalFailureConnectionStrategy(int attempts,
                                      boolean blocking)

Parameters:

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

Method Detail

clientConnectionMonitor

public ClientConnectionMonitor clientConnectionMonitor()

clientConnectionMonitor

public FatalFailureConnectionStrategy clientConnectionMonitor(ClientConnectionMonitor fatalFailureMonitor)

connect

@Nullable
public @Nullable ChronicleSocketChannel connect(@NotNull
                                                          @NotNull String name,
                                                          @NotNull
                                                          @NotNull SocketAddressSupplier socketAddressSupplier,
                                                          boolean didLogIn,
                                                          @Nullable
                                                          @Nullable FatalFailureMonitor fatalFailureMonitor)
                                                   throws InterruptedException

Description copied from interface: ConnectionStrategy

Connects and returns a new SocketChannel.

Parameters:

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

socketAddressSupplier - to use for address

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

fatalFailureMonitor - this is invoked on failures

Returns:

the SocketChannel

Throws:

InterruptedException - if the channel is interrupted.