https://github.com/datastax/java-driver/java-driver-core: A driver for Apache Cassandra(R) 2.1+ that works exclusively with the Cassandra Query Language version 3 (CQL3) and Cassandra's native protocol versions 3 and above.
  • Various (DataStax) 
/*
 * Copyright DataStax, Inc.
 *
 * Licensed 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 com.datastax.oss.driver.internal.core.metadata.schema;

import com.datastax.oss.driver.api.core.context.DriverContext;
import com.datastax.oss.driver.api.core.metadata.schema.SchemaChangeListener;
import com.datastax.oss.driver.api.core.metadata.schema.SchemaChangeListenerBase;
import com.datastax.oss.driver.api.core.session.SessionBuilder;
import net.jcip.annotations.ThreadSafe;


Default schema change listener implementation with empty methods.

To activate this listener, modify the advanced.schema-change-listener section in the driver configuration, for example: 
datastax-java-driver {
  advanced.schema-change-listener {
    class = NoopSchemaChangeListener
  }
}

 See reference.conf (in the manual or core driver JAR) for more details. 
Note that if a listener is specified programmatically with SessionBuilder.withSchemaChangeListener(SchemaChangeListener), the configuration is ignored. 
/**
 * Default schema change listener implementation with empty methods.
 *
 * <p>To activate this listener, modify the {@code advanced.schema-change-listener} section in the
 * driver configuration, for example:
 *
 * <pre>
 * datastax-java-driver {
 *   advanced.schema-change-listener {
 *     class = NoopSchemaChangeListener
 *   }
 * }
 * </pre>
 *
 * See {@code reference.conf} (in the manual or core driver JAR) for more details.
 *
 * <p>Note that if a listener is specified programmatically with {@link
 * SessionBuilder#withSchemaChangeListener(SchemaChangeListener)}, the configuration is ignored.
 */
@ThreadSafe
public class NoopSchemaChangeListener extends SchemaChangeListenerBase {

  public NoopSchemaChangeListener(@SuppressWarnings("unused") DriverContext context) {
    // nothing to do
  }
}