com.palantir.lock.v2.LockResponseV2 Maven / Gradle / Ivy

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/*
 * (c) Copyright 2019 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.v2;

import com.fasterxml.jackson.annotation.JsonSubTypes;
import com.fasterxml.jackson.annotation.JsonTypeInfo;
import com.fasterxml.jackson.annotation.JsonTypeName;
import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
import com.fasterxml.jackson.databind.annotation.JsonSerialize;
import java.util.function.Function;
import org.immutables.value.Value;

@JsonTypeInfo(use = JsonTypeInfo.Id.NAME, property = "type")
@JsonSubTypes({
    @JsonSubTypes.Type(LockResponseV2.Successful.class),
    @JsonSubTypes.Type(LockResponseV2.Unsuccessful.class)
})
public interface LockResponseV2 {
     T accept(Visitor visitor);

    @Value.Immutable
    @JsonSerialize(as = ImmutableSuccessful.class)
    @JsonDeserialize(as = ImmutableSuccessful.class)
    @JsonTypeName("success")
    interface Successful extends LockResponseV2 {
        LockToken getToken();

        Lease getLease();

        @Override
        default  T accept(Visitor visitor) {
            return visitor.visit(this);
        }
    }

    @Value.Immutable(singleton = true)
    @JsonSerialize(as = ImmutableUnsuccessful.class)
    @JsonDeserialize(as = ImmutableUnsuccessful.class)
    @JsonTypeName("failure")
    interface Unsuccessful extends LockResponseV2 {
        @Override
        default  T accept(Visitor visitor) {
            return visitor.visit(this);
        }
    }

    interface Visitor {
        T visit(Successful successful);

        T visit(Unsuccessful failure);

        static  Visitor of(Function successFunction, Function failureFunction) {
            return new Visitor() {
                @Override
                public T visit(Successful successful) {
                    return successFunction.apply(successful);
                }

                @Override
                public T visit(Unsuccessful failure) {
                    return failureFunction.apply(failure);
                }
            };
        }
    }

    static LockResponseV2 successful(LockToken lockToken, Lease lease) {
        return ImmutableSuccessful.builder().token(lockToken).lease(lease).build();
    }

    static LockResponseV2 timedOut() {
        return ImmutableUnsuccessful.of();
    }
}