com.palantir.lock.watch.LockWatchInfo Maven / Gradle / Ivy

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/*
 * (c) Copyright 2020 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.lock.watch;

import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
import com.fasterxml.jackson.databind.annotation.JsonSerialize;
import java.util.OptionalLong;
import org.immutables.value.Value;

@JsonSerialize(as = ImmutableLockWatchInfo.class)
@JsonDeserialize(as = ImmutableLockWatchInfo.class)
@Value.Immutable
@SuppressWarnings("ClassInitializationDeadlock")
public interface LockWatchInfo {

    @Deprecated
    LockWatchInfo UNKNOWN = ImmutableLockWatchInfo.of(State.NOT_WATCHED, OptionalLong.empty());

    @Value.Parameter
    State state();

    @Value.Parameter
    OptionalLong lastLocked();

    static LockWatchInfo of(State state, OptionalLong lastLocked) {
        return ImmutableLockWatchInfo.of(state, lastLocked);
    }

    static LockWatchInfo of(State state, long lastLocked) {
        return ImmutableLockWatchInfo.of(state, OptionalLong.of(lastLocked));
    }

    enum State {
        LOCKED,
        UNLOCKED,
        NOT_WATCHED
    }
}