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/**
 *
 */
package de.taimos.dvalin.jaxrs.monitoring;

/*
 * #%L
 * Daemon with Spring and CXF
 * %%
 * Copyright (C) 2013 - 2015 Taimos GmbH
 * %%
 * 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.
 * #L%
 */

import java.lang.reflect.Method;

public class InvocationInstance {

    private final String messageId;

    private long startNano;

    private long endNano;

    private long duration;

    private Method calledMethod;

    private String calledClass;

    private String calledMethodName;

    private String requestURI;


    /**
     * @param messageId the message id
     */
    public InvocationInstance(String messageId, String requestURI) {
        this.messageId = messageId;
        this.requestURI = requestURI;
    }

    /**
     * start timer
     */
    public void start() {
        this.startNano = INanoTimer.system().nanoTime();
    }

    /**
     * stop timer
     */
    public void stop() {
        this.endNano = INanoTimer.system().nanoTime();
        this.duration = this.endNano - this.startNano;
        this.duration = this.duration / 1000000; // convert to ms
    }

    @Override
    public String toString() {
        final String msgString = "Message %s was %s ms inflight. Access was to class '%s' and method '%s' via URI '%s'";
        return String.format(msgString, this.getMessageId(), this.getDuration(), this.getCalledClass(), this.getCalledMethod(), this.getRequestURI());
    }

    // #########################################
    // getter / setter
    // #########################################

    /**
     * @return the startNano
     */
    public long getStartNano() {
        return this.startNano;
    }

    /**
     * @return the endNano
     */
    public long getEndNano() {
        return this.endNano;
    }

    /**
     * @return the calledMethod
     */
    public Method getCalledMethod() {
        return this.calledMethod;
    }

    /**
     * @param calledMethod the calledMethod to set
     */
    public void setCalledMethod(Method calledMethod) {
        this.calledMethod = calledMethod;
        if ((calledMethod != null) && (calledMethod.getDeclaringClass() != null)) {
            this.calledMethodName = calledMethod.getName();
            this.calledClass = calledMethod.getDeclaringClass().getCanonicalName();
        }
    }

    /**
     * @return the duration
     */
    public long getDuration() {
        return this.duration;
    }

    /**
     * @return the messageId
     */
    public String getMessageId() {
        return this.messageId;
    }

    /**
     * @return the calledClass
     */
    public String getCalledClass() {
        return this.calledClass;
    }

    /**
     * @return the calledMethodName
     */
    public String getCalledMethodName() {
        return this.calledMethodName;
    }

    public String getRequestURI() {
        return this.requestURI;
    }
}