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/*
 * Copyright (c) 2008-2021, 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.cp.internal.session.operation;

import com.hazelcast.cp.CPGroupId;
import com.hazelcast.cp.internal.IndeterminateOperationStateAware;
import com.hazelcast.cp.internal.RaftOp;
import com.hazelcast.cp.internal.session.RaftSessionService;
import com.hazelcast.cp.internal.session.RaftSessionServiceDataSerializerHook;
import com.hazelcast.nio.ObjectDataInput;
import com.hazelcast.nio.ObjectDataOutput;
import com.hazelcast.nio.serialization.IdentifiedDataSerializable;

import java.io.IOException;
import java.util.ArrayList;

/**
 * Returns the collection of active sessions in the given Raft group
 */
public class GetSessionsOp extends RaftOp implements IndeterminateOperationStateAware, IdentifiedDataSerializable {

    @Override
    public Object run(CPGroupId groupId, long commitIndex) {
        RaftSessionService service = getService();
        return new ArrayList<>(service.getSessionsLocally(groupId));
    }

    @Override
    public boolean isRetryableOnIndeterminateOperationState() {
        return true;
    }

    @Override
    public String getServiceName() {
        return RaftSessionService.SERVICE_NAME;
    }

    @Override
    public int getFactoryId() {
        return RaftSessionServiceDataSerializerHook.F_ID;
    }

    @Override
    public int getClassId() {
        return RaftSessionServiceDataSerializerHook.GET_SESSIONS_OP;
    }

    @Override
    public void writeData(ObjectDataOutput out) throws IOException {
    }

    @Override
    public void readData(ObjectDataInput in) throws IOException {
    }
}