com.palantir.atlasdb.keyvalue.cassandra.CassandraApiVersion Maven / Gradle / Ivy

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/*
 * (c) Copyright 2018 Palantir Technologies Inc. All rights reserved.
 *
 * 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.palantir.atlasdb.keyvalue.cassandra;

import com.palantir.logsafe.SafeArg;
import com.palantir.logsafe.logger.SafeLogger;
import com.palantir.logsafe.logger.SafeLoggerFactory;
import java.util.Arrays;

public class CassandraApiVersion {
    private static final SafeLogger log = SafeLoggerFactory.get(CassandraApiVersion.class);

    private final String versionString;
    private final int majorVersion;
    private final int minorVersion;

    public CassandraApiVersion(String versionString) {
        this.versionString = versionString;
        String[] components = versionString.split("\\.");
        if (components.length != 3) {
            throw new UnsupportedOperationException(String.format(
                    "Illegal version of Thrift protocol detected; expected format '#.#.#', got '%s'",
                    Arrays.toString(components)));
        }
        majorVersion = Integer.parseInt(components[0]);
        minorVersion = Integer.parseInt(components[1]);
    }

    // This corresponds to the version change in
    // https://github.com/apache/cassandra/commit/8b0e1868e8cf8
    public boolean supportsCheckAndSet() {
        boolean supportsCheckAndSet = majorVersion > 19 || (majorVersion == 19 && minorVersion >= 37);

        if (supportsCheckAndSet) {
            log.info(
                    "Your cassandra api version ({}) supports check and set.",
                    SafeArg.of("cassandraVersion", versionString));
        } else {
            log.info(
                    "Your cassandra api version ({}) does not support check and set.",
                    SafeArg.of("cassandraVersion", versionString));
        }

        return supportsCheckAndSet;
    }

    @Override
    public String toString() {
        return versionString;
    }
}