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package org.pepsoft.util.mdc;

import org.slf4j.MDC;

import java.util.Map;

/**
 * A {@link RuntimeException} which captures the current contents of the {@link MDC} thread local diagnostic context at
 * the moment of throwing. The captured context is available from the {@link #getMdcContext()} method.
 *
 * This exception is meant for adding semantic information to the exception chain. To just capture the MDC
 * context, use {@link MDCWrappingRuntimeException}.
 */
public class MDCCapturingRuntimeException extends RuntimeException implements MDCContextProvider {
    public MDCCapturingRuntimeException(String message) {
        super(message);
        mdcContext = MDC.getCopyOfContextMap();
    }

    public MDCCapturingRuntimeException(String message, Throwable cause) {
        super(message, cause);
        mdcContext = MDC.getCopyOfContextMap();
    }

    // MDCContextProvider

    public final Map getMdcContext() {
        return mdcContext;
    }

    private final Map mdcContext;
}