com.hazelcast.web.entryprocessor.GetAttributeEntryProcessor Maven / Gradle / Ivy

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/*
 * Copyright (c) 2008-2015, 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.web.entryprocessor;

import com.hazelcast.map.EntryBackupProcessor;
import com.hazelcast.map.EntryProcessor;
import com.hazelcast.nio.ObjectDataInput;
import com.hazelcast.nio.ObjectDataOutput;
import com.hazelcast.nio.serialization.Data;
import com.hazelcast.nio.serialization.IdentifiedDataSerializable;
import com.hazelcast.web.JvmIdAware;
import com.hazelcast.web.SessionState;
import com.hazelcast.web.WebDataSerializerHook;

import java.io.IOException;
import java.util.Map;

/**
 * Entry processor which return attributes of SessionState values and
 * adds current jvmId into SessionState. See GetAttributeEntryProcessor.process
 */

public final class GetAttributeEntryProcessor implements EntryProcessor,
        IdentifiedDataSerializable, JvmIdAware {

    String attributeName;
    private String jvmId;

    public GetAttributeEntryProcessor(String attributeName) {
        this.attributeName = attributeName;
    }

    public GetAttributeEntryProcessor() {
        this(null);
    }


    public String getJvmId() {
        return jvmId;
    }

    public void setJvmId(String jvmId) {
        this.jvmId = jvmId;
    }

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

    @Override
    public int getId() {
        return WebDataSerializerHook.GET_ATTRIBUTE;
    }

    @Override
    public Data process(Map.Entry entry) {
        SessionState sessionState = entry.getValue();
        if (sessionState == null) {
            return null;
        }
        sessionState.addJvmId(jvmId);
        entry.setValue(sessionState);
        return sessionState.getAttributes().get(attributeName);
    }

    @Override
    public EntryBackupProcessor getBackupProcessor() {
        return null;
    }

    @Override
    public void readData(ObjectDataInput in) throws IOException {
        attributeName = in.readUTF();
        jvmId = in.readUTF();
    }

    @Override
    public void writeData(ObjectDataOutput out) throws IOException {
        out.writeUTF(attributeName);
        out.writeUTF(jvmId);
    }
}