/*
 * Copyright 2017 NAVER Corp.
 *
 * 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.navercorp.pinpoint.profiler.metadata;

import com.google.inject.Inject;
import com.google.inject.name.Named;
import com.navercorp.pinpoint.profiler.context.module.AgentId;
import com.navercorp.pinpoint.profiler.context.module.AgentStartTime;
import com.navercorp.pinpoint.profiler.sender.EnhancedDataSender;
import com.navercorp.pinpoint.thrift.dto.TStringMetaData;

/**
 * @author Woonduk Kang(emeroad)
 */
public class DefaultStringMetaDataService implements StringMetaDataService {

    private final SimpleCache<String> stringCache = new SimpleCache<String>();

    private final String agentId;
    private final long agentStartTime;
    private final EnhancedDataSender enhancedDataSender;

    @Inject
    public DefaultStringMetaDataService(@AgentId String agentId, @AgentStartTime long agentStartTime, EnhancedDataSender enhancedDataSender) {
        if (agentId == null) {
            throw new NullPointerException("agentId must not be null");
        }
        if (enhancedDataSender == null) {
            throw new NullPointerException("enhancedDataSender must not be null");
        }
        this.agentId = agentId;
        this.agentStartTime = agentStartTime;
        this.enhancedDataSender = enhancedDataSender;
    }

    @Override
    public int cacheString(final String value) {
        if (value == null) {
            return 0;
        }
        final Result result = this.stringCache.put(value);
        if (result.isNewValue()) {
            final TStringMetaData stringMetaData = new TStringMetaData();
            stringMetaData.setAgentId(agentId);
            stringMetaData.setAgentStartTime(agentStartTime);

            stringMetaData.setStringId(result.getId());
            stringMetaData.setStringValue(value);
            this.enhancedDataSender.request(stringMetaData);
        }
        return result.getId();
    }
}