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BeginMessage.java
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BeginMessage.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.v3.messaging.request;
import java.time.Duration;
import java.util.Objects;
import org.neo4j.bolt.messaging.BoltIOException;
import org.neo4j.bolt.messaging.RequestMessage;
import org.neo4j.bolt.v1.runtime.bookmarking.Bookmark;
import org.neo4j.bolt.v3.messaging.decoder.StatementMode;
import org.neo4j.internal.kernel.api.exceptions.KernelException;
import org.neo4j.kernel.api.exceptions.Status;
import org.neo4j.values.AnyValue;
import org.neo4j.values.storable.LongValue;
import org.neo4j.values.storable.TextValue;
import org.neo4j.values.storable.Values;
import org.neo4j.values.virtual.MapValue;
import org.neo4j.values.virtual.VirtualValues;
import static java.util.Objects.requireNonNull;
public class BeginMessage implements RequestMessage
{
private final MapValue meta;
private final StatementMode mode;
private final Bookmark bookmark;
private final Duration txTimeout;
private static final String MODE_KEY = "mode";
private static final String TX_TIMEOUT_KEY = "tx_timeout";
public static final byte SIGNATURE = 0x11;
public BeginMessage() throws BoltIOException
{
this( VirtualValues.EMPTY_MAP );
}
public BeginMessage( MapValue meta ) throws BoltIOException
{
this.meta = requireNonNull( meta );
this.bookmark = parseBookmark( meta );
this.mode = parseStatementMode( meta );
this.txTimeout = parseTransactionTimeout( meta );
}
static Bookmark parseBookmark( MapValue meta ) throws BoltIOException
{
try
{
return Bookmark.fromParamsOrNull( meta );
}
catch ( KernelException e )
{
throw new BoltIOException( Status.Request.InvalidFormat, e.getMessage(), e );
}
}
static Duration parseTransactionTimeout( MapValue meta ) throws BoltIOException
{
AnyValue anyValue = meta.get( TX_TIMEOUT_KEY );
if ( anyValue == Values.NO_VALUE )
{
return null;
}
else if ( anyValue instanceof LongValue )
{
return Duration.ofMillis( ((LongValue) anyValue).longValue() );
}
else
{
throw new BoltIOException( Status.Request.InvalidFormat, "Expecting transaction timeout value to be a Long value, but got: " + anyValue );
}
}
static StatementMode parseStatementMode( MapValue meta ) throws BoltIOException
{
AnyValue anyValue = meta.get( MODE_KEY );
if ( anyValue == Values.NO_VALUE )
{
return null;
}
else if ( anyValue instanceof TextValue )
{
return StatementMode.parseMode( ((TextValue) anyValue).stringValue() );
}
else
{
throw new BoltIOException( Status.Request.InvalidFormat, "Expecting transaction statement mode value to be a String value, but got: " + anyValue );
}
}
public Bookmark bookmark()
{
return this.bookmark;
}
public StatementMode mode()
{
return this.mode;
}
public Duration transactionTimeout()
{
return this.txTimeout;
}
@Override
public boolean safeToProcessInAnyState()
{
return false;
}
@Override
public boolean equals( Object o )
{
if ( this == o )
{
return true;
}
if ( o == null || getClass() != o.getClass() )
{
return false;
}
BeginMessage that = (BeginMessage) o;
return Objects.equals( meta, that.meta ) && Objects.equals( meta, that.meta );
}
@Override
public int hashCode()
{
return Objects.hash( meta );
}
@Override
public String toString()
{
return "BEGIN " + meta;
}
public MapValue meta()
{
return meta;
}
}