org.apache.cassandra.cql3.QueryHandler.java Source code

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Here is the source code for org.apache.cassandra.cql3.QueryHandler.java

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/*
 * 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.cql3;

import java.nio.ByteBuffer;
import java.util.Map;

import org.apache.cassandra.cql3.statements.BatchStatement;
import org.apache.cassandra.exceptions.RequestExecutionException;
import org.apache.cassandra.exceptions.RequestValidationException;
import org.apache.cassandra.service.ClientState;
import org.apache.cassandra.service.QueryState;
import org.apache.cassandra.transport.messages.ResultMessage;
import org.apache.cassandra.utils.MD5Digest;

public interface QueryHandler {
    ResultMessage process(String query, QueryState state, QueryOptions options,
            Map<String, ByteBuffer> customPayload, long queryStartNanoTime)
            throws RequestExecutionException, RequestValidationException;

    ResultMessage.Prepared prepare(String query, ClientState clientState, Map<String, ByteBuffer> customPayload)
            throws RequestValidationException;

    QueryHandler.Prepared getPrepared(MD5Digest id);

    ResultMessage processPrepared(CQLStatement statement, QueryState state, QueryOptions options,
            Map<String, ByteBuffer> customPayload, long queryStartNanoTime)
            throws RequestExecutionException, RequestValidationException;

    ResultMessage processBatch(BatchStatement statement, QueryState state, BatchQueryOptions options,
            Map<String, ByteBuffer> customPayload, long queryStartNanoTime)
            throws RequestExecutionException, RequestValidationException;

    public static class Prepared {
        public final CQLStatement statement;

        public final MD5Digest resultMetadataId;

        /**
         * Contains the CQL statement source if the statement has been "regularly" perpared via
         * {@link QueryHandler#prepare(String, ClientState, Map)}.
         * Other usages of this class may or may not contain the CQL statement source.
         */
        public final String rawCQLStatement;

        public Prepared(CQLStatement statement) {
            this(statement, "");
        }

        public Prepared(CQLStatement statement, String rawCQLStatement) {
            this.statement = statement;
            this.rawCQLStatement = rawCQLStatement;
            this.resultMetadataId = ResultSet.ResultMetadata.fromPrepared(statement).getResultMetadataId();
        }
    }
}