com.guardtime.ksi.service.tcp.ActiveTransactionsHolder Maven / Gradle / Ivy

/*
 * Copyright 2013-2018 Guardtime, Inc.
 *
 *  This file is part of the Guardtime client SDK.
 *
 *  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, CONDITIONS, OR OTHER LICENSES OF ANY KIND, either
 *  express or implied. See the License for the specific language governing
 *  permissions and limitations under the License.
 *  "Guardtime" and "KSI" are trademarks or registered trademarks of
 *  Guardtime, Inc., and no license to trademarks is granted; Guardtime
 *  reserves and retains all trademark rights.
 *
 */
package com.guardtime.ksi.service.tcp;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;

/**
 * Holds a map of active KSI TCP transactions by ID. I helps to keep track which responses go together with which requests
 * Each request is added to this holder, and each response passes through it to check that there is a corresponding request waiting.
 */
class ActiveTransactionsHolder {

    private static final Logger logger = LoggerFactory.getLogger(ActiveTransactionsHolder.class);

    private static final ConcurrentMap ACTIVE_TRANSACTIONS = new ConcurrentHashMap<>();

    synchronized static void put(KSITCPTransaction transaction) {
        ACTIVE_TRANSACTIONS.put(transaction.getCorrelationId(), transaction);
    }

    synchronized static void remove(KSITCPTransaction transaction) {
        ACTIVE_TRANSACTIONS.remove(transaction.getCorrelationId());
    }

    synchronized static void responseReceived(KSITCPTransaction transaction) {
        long correlationId = transaction.getCorrelationId();
        if (ACTIVE_TRANSACTIONS.get(correlationId) != null) {
            ACTIVE_TRANSACTIONS.get(correlationId).responseReceived(transaction.getResponse());
        } else {
            logger.info("Received TCP response with id {}, but did not find corresponding request. It might have timed out.", correlationId);
        }
    }
}