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/*
 * Copyright (c) 2008-2024, Hazelcast, 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.hazelcast.instance.impl;

public class InstanceFuture {
    private volatile T hz;
    private volatile Throwable throwable;

    public T get() {
        if (hz != null) {
            return hz;
        }

        boolean restoreInterrupt = false;
        synchronized (this) {
            while (hz == null && throwable == null) {
                try {
                    wait();
                } catch (InterruptedException ignored) {
                    restoreInterrupt = true;
                }
            }
        }

        if (restoreInterrupt) {
            Thread.currentThread().interrupt();
        }

        if (hz != null) {
            return hz;
        }

        throw new IllegalStateException(throwable);
    }

    public void set(T proxy) {
        synchronized (this) {
            this.hz = proxy;
            notifyAll();
        }
    }

    public void setFailure(Throwable throwable) {
        synchronized (this) {
            this.throwable = throwable;
            notifyAll();
        }
    }

    public boolean isSet() {
        return hz != null;
    }
}