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The Apache Cassandra Project develops a highly scalable second-generation distributed database, bringing together Dynamo's fully distributed design and Bigtable's ColumnFamily-based data model.
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.cassandra.schema;
import java.io.Serializable;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
import java.util.stream.Collectors;
import javax.annotation.Nullable;
import org.apache.cassandra.audit.AuditLogContext;
import org.apache.cassandra.cql3.CQLStatement;
import org.apache.cassandra.diag.DiagnosticEvent;
import org.apache.cassandra.locator.InetAddressAndPort;
/**
* Events emitted by {@link MigrationManager} around propagating schema changes to remote nodes.
*/
final class SchemaAnnouncementEvent extends DiagnosticEvent
{
private final SchemaAnnouncementEventType type;
@Nullable
private final Set schemaDestinationEndpoints;
@Nullable
private final Set schemaEndpointsIgnored;
@Nullable
private final CQLStatement statement;
@Nullable
private final InetAddressAndPort sender;
enum SchemaAnnouncementEventType
{
SCHEMA_MUTATIONS_ANNOUNCED,
SCHEMA_TRANSFORMATION_ANNOUNCED,
SCHEMA_MUTATIONS_RECEIVED
}
SchemaAnnouncementEvent(SchemaAnnouncementEventType type,
@Nullable Set schemaDestinationEndpoints,
@Nullable Set schemaEndpointsIgnored,
@Nullable SchemaTransformation transformation,
@Nullable InetAddressAndPort sender)
{
this.type = type;
this.schemaDestinationEndpoints = schemaDestinationEndpoints;
this.schemaEndpointsIgnored = schemaEndpointsIgnored;
if (transformation instanceof CQLStatement) this.statement = (CQLStatement) transformation;
else this.statement = null;
this.sender = sender;
}
public Enum> getType()
{
return type;
}
public Map toMap()
{
HashMap ret = new HashMap<>();
if (schemaDestinationEndpoints != null)
{
Set eps = schemaDestinationEndpoints.stream().map(InetAddressAndPort::toString).collect(Collectors.toSet());
ret.put("endpointDestinations", new HashSet<>(eps));
}
if (schemaEndpointsIgnored != null)
{
Set eps = schemaEndpointsIgnored.stream().map(InetAddressAndPort::toString).collect(Collectors.toSet());
ret.put("endpointIgnored", new HashSet<>(eps));
}
if (statement != null)
{
AuditLogContext logContext = statement.getAuditLogContext();
if (logContext != null)
{
HashMap log = new HashMap<>();
if (logContext.auditLogEntryType != null) log.put("type", logContext.auditLogEntryType.name());
if (logContext.keyspace != null) log.put("keyspace", logContext.keyspace);
if (logContext.scope != null) log.put("table", logContext.scope);
ret.put("statement", log);
}
}
if (sender != null) ret.put("sender", sender.toString());
return ret;
}
}
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