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This is the web module of Microsoft Application Insights Java SDK

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/*
 * ApplicationInsights-Java
 * Copyright (c) Microsoft Corporation
 * All rights reserved.
 *
 * MIT License
 * Permission is hereby granted, free of charge, to any person obtaining a copy of this
 * software and associated documentation files (the ""Software""), to deal in the Software
 * without restriction, including without limitation the rights to use, copy, modify, merge,
 * publish, distribute, sublicense, and/or sell copies of the Software, and to permit
 * persons to whom the Software is furnished to do so, subject to the following conditions:
 * The above copyright notice and this permission notice shall be included in all copies or
 * substantial portions of the Software.
 * THE SOFTWARE IS PROVIDED *AS IS*, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
 * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
 * PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
 * FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 */

package com.microsoft.applicationinsights.web.extensibility.initializers;

import com.microsoft.applicationinsights.extensibility.TelemetryInitializer;
import com.microsoft.applicationinsights.telemetry.Telemetry;
import com.microsoft.applicationinsights.web.internal.ThreadContext;

/**
 * Created by yonisha on 2/16/2015.
 */
public abstract class WebTelemetryInitializerBase implements TelemetryInitializer {

    /**
     * Initializes properties of the given telemetry.
     * @param telemetry The {@link com.microsoft.applicationinsights.telemetry.Telemetry} to initialize.
     */
    @Override
    public void initialize(Telemetry telemetry) {

        // Some threads may not have TLS initialized, such as performance counters mechanism threads.
        if (ThreadContext.getRequestTelemetryContext() == null) {
            return;
        }

        onInitializeTelemetry(telemetry);
    }

    /**
     * Initializes the properties of the given telemetry.
     * @param telemetry The {@link com.microsoft.applicationinsights.telemetry.Telemetry} to initialize.
     */
    protected abstract void onInitializeTelemetry(Telemetry telemetry);
}