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ConnectedState.java
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ConnectedState.java
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/*
* Copyright (c) 2002-2018 "Neo4j,"
* Neo4j Sweden AB [http://neo4j.com]
*
* This file is part of Neo4j.
*
* Neo4j is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.neo4j.bolt.v1.runtime;
import java.util.Map;
import org.neo4j.bolt.messaging.RequestMessage;
import org.neo4j.bolt.runtime.BoltConnectionFatality;
import org.neo4j.bolt.runtime.BoltQuerySource;
import org.neo4j.bolt.runtime.BoltStateMachineState;
import org.neo4j.bolt.runtime.StateMachineContext;
import org.neo4j.bolt.runtime.StatementProcessor;
import org.neo4j.bolt.security.auth.AuthenticationResult;
import org.neo4j.bolt.v1.messaging.request.InitMessage;
import org.neo4j.values.storable.Values;
import static org.neo4j.util.Preconditions.checkState;
/**
* Following the socket connection and a small handshake exchange to
* establish protocol version, the machine begins in the CONNECTED
* state. The <em>only</em> valid transition from here is through a
* correctly authorised INIT into the READY state. Any other action
* results in disconnection.
*/
public class ConnectedState implements BoltStateMachineState
{
private BoltStateMachineState readyState;
private BoltStateMachineState failedState;
@Override
public BoltStateMachineState process( RequestMessage message, StateMachineContext context ) throws BoltConnectionFatality
{
assertInitialized();
if ( message instanceof InitMessage )
{
return processInitMessage( (InitMessage) message, context );
}
return null;
}
@Override
public String name()
{
return "CONNECTED";
}
public void setReadyState( BoltStateMachineState readyState )
{
this.readyState = readyState;
}
public void setFailedState( BoltStateMachineState failedState )
{
this.failedState = failedState;
}
private BoltStateMachineState processInitMessage( InitMessage message, StateMachineContext context ) throws BoltConnectionFatality
{
String userAgent = message.userAgent();
Map<String,Object> authToken = message.authToken();
try
{
AuthenticationResult authResult = context.boltSpi().authenticate( authToken );
String username = authResult.getLoginContext().subject().username();
context.authenticatedAsUser( username );
StatementProcessor statementProcessor = newStatementProcessor( username, userAgent, authResult, context );
context.connectionState().setStatementProcessor( statementProcessor );
if ( authResult.credentialsExpired() )
{
context.connectionState().onMetadata( "credentials_expired", Values.TRUE );
}
context.connectionState().onMetadata( "server", Values.stringValue( context.boltSpi().version() ) );
context.boltSpi().udcRegisterClient( userAgent );
return readyState;
}
catch ( Throwable t )
{
context.handleFailure( t, true );
return failedState;
}
}
private static StatementProcessor newStatementProcessor( String username, String userAgent, AuthenticationResult authResult, StateMachineContext context )
{
TransactionStateMachine statementProcessor = new TransactionStateMachine( context.boltSpi().transactionSpi(), authResult, context.clock() );
statementProcessor.setQuerySource( new BoltQuerySource( username, userAgent, context.boltSpi().connectionDescriptor() ) );
return statementProcessor;
}
private void assertInitialized()
{
checkState( readyState != null, "Ready state not set" );
checkState( failedState != null, "Failed state not set" );
}
}