/*
* Copyright (c) 2011-2019 Contributors to the Eclipse Foundation
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License 2.0 which is available at
* http://www.eclipse.org/legal/epl-2.0, or the Apache License, Version 2.0
* which is available at https://www.apache.org/licenses/LICENSE-2.0.
*
* SPDX-License-Identifier: EPL-2.0 OR Apache-2.0
*/
package io.vertx.core.spi.metrics;
The client metrics SPI that Vert.x will use to call when client events occur.
Author: Julien Viet
/**
* The client metrics SPI that Vert.x will use to call when client events occur.<p/>
*
* @author <a href="mailto:julien@julienviet.com">Julien Viet</a>
*/
public interface ClientMetrics<M, T, Req, Resp> extends Metrics {
Called when a connection is requested.
/**
* Called when a connection is requested.
*/
default T enqueueRequest() {
return null;
}
Called when a request for connection is satisfied.
/**
* Called when a request for connection is satisfied.
*/
default void dequeueRequest(T taskMetric) {
}
Called when a client request begins. Vert.x will invoke requestEnd
when the request has ended or requestReset
if the request/response has failed before. The request uri is an arbitrary URI that depends on the client, e.g an HTTP request uri,
a SQL query, etc...
Params: - uri – an arbitrary uri
- request – the request object
Returns: the request metric
/**
* Called when a client request begins. Vert.x will invoke {@link #requestEnd} when the request
* has ended or {@link #requestReset} if the request/response has failed before.
*
* <p>The request uri is an arbitrary URI that depends on the client, e.g an HTTP request uri,
* a SQL query, etc...
*
* @param uri an arbitrary uri
* @param request the request object
* @return the request metric
*/
default M requestBegin(String uri, Req request) {
return null;
}
Calls requestEnd(Object, long)
with -1L
/**
* Calls {@link #requestEnd(Object, long)} with {@code -1L}
*/
default void requestEnd(M requestMetric) {
requestEnd(requestMetric, -1L);
}
Called when the client request ends.
Params: - requestMetric – the request metric
- bytesWritten – the number of bytes written or
-1
when it is not known
/**
* Called when the client request ends.
*
* @param requestMetric the request metric
* @param bytesWritten the number of bytes written or {@code -1} when it is not known
*/
default void requestEnd(M requestMetric, long bytesWritten) {
}
Called when the client response begins. Vert.x will invoke responseEnd
when the response has ended or requestReset
if the request/response has failed before. Params: - requestMetric – the request metric
- response – the response object
/**
* Called when the client response begins. Vert.x will invoke {@link #responseEnd} when the response has ended
* or {@link #requestReset} if the request/response has failed before.
*
* @param requestMetric the request metric
* @param response the response object
*/
default void responseBegin(M requestMetric, Resp response) {
}
Called when the client request couldn't complete successfully, for instance the connection
was closed before the response was received.
Params: - requestMetric – the request metric
/**
* Called when the client request couldn't complete successfully, for instance the connection
* was closed before the response was received.
*
* @param requestMetric the request metric
*/
default void requestReset(M requestMetric) {
}
Calls responseEnd(Object, long)
with -1L
/**
* Calls {@link #responseEnd(Object, long)} with {@code -1L}
*/
default void responseEnd(M requestMetric) {
responseEnd(requestMetric, -1L);
}
Called when the client response has ended
Params: - requestMetric – the request metric
- bytesRead – the number of bytes read or
-1
when it is not known
/**
* Called when the client response has ended
*
* @param requestMetric the request metric
* @param bytesRead the number of bytes read or {@code -1} when it is not known
*/
default void responseEnd(M requestMetric, long bytesRead) {
}
}