| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to you 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. |
| */ |
| package org.apache.calcite.avatica.server; |
| |
| import org.apache.calcite.avatica.metrics.MetricsSystem; |
| |
| /** |
| * An {@link AvaticaHandler} that is capable of collecting metrics. |
| */ |
| public interface MetricsAwareAvaticaHandler extends AvaticaHandler { |
| |
| /** |
| * General prefix for all metrics in a handler. |
| */ |
| String HANDLER_PREFIX = "Handler."; |
| |
| /** |
| * Name for timing requests from users |
| */ |
| String REQUEST_TIMER_NAME = HANDLER_PREFIX + "RequestTimings"; |
| |
| /** |
| * @return An instance of the {@link MetricsSystem} for this AvaticaHandler. |
| */ |
| MetricsSystem getMetrics(); |
| |
| } |
| |
| // End MetricsAwareAvaticaHandler.java |