| /* |
| * 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 |
| * <p> |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * <p> |
| * 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.ratis.server.metrics; |
| |
| import org.apache.ratis.metrics.MetricRegistryInfo; |
| import org.apache.ratis.metrics.RatisMetricRegistry; |
| import org.apache.ratis.metrics.RatisMetrics; |
| import org.apache.ratis.protocol.RaftGroupMemberId; |
| import org.apache.ratis.protocol.RaftPeerId; |
| import org.apache.ratis.util.Timestamp; |
| |
| import java.util.function.LongSupplier; |
| import java.util.function.Supplier; |
| |
| public final class LogAppenderMetrics extends RatisMetrics { |
| public static final String RATIS_LOG_APPENDER_METRICS = "log_appender"; |
| public static final String RATIS_LOG_APPENDER_METRICS_DESC = "Metrics for log appender"; |
| |
| public static final String FOLLOWER_NEXT_INDEX = "follower_%s_next_index"; |
| public static final String FOLLOWER_MATCH_INDEX = "follower_%s_match_index"; |
| public static final String FOLLOWER_RPC_RESP_TIME = "follower_%s_rpc_response_time"; |
| |
| public LogAppenderMetrics(RaftGroupMemberId groupMemberId) { |
| registry = getMetricRegistryForLogAppender(groupMemberId.toString()); |
| } |
| |
| private RatisMetricRegistry getMetricRegistryForLogAppender(String serverId) { |
| return create(new MetricRegistryInfo(serverId, |
| RATIS_APPLICATION_NAME_METRICS, |
| RATIS_LOG_APPENDER_METRICS, RATIS_LOG_APPENDER_METRICS_DESC)); |
| } |
| |
| public void addFollowerGauges(RaftPeerId id, LongSupplier getNextIndex, LongSupplier getMatchIndex, |
| Supplier<Timestamp> getLastRpcTime) { |
| registry.gauge(String.format(FOLLOWER_NEXT_INDEX, id), () -> getNextIndex::getAsLong); |
| registry.gauge(String.format(FOLLOWER_MATCH_INDEX, id), () -> getMatchIndex::getAsLong); |
| registry.gauge(String.format(FOLLOWER_RPC_RESP_TIME, id), () -> () -> getLastRpcTime.get().elapsedTimeMs()); |
| } |
| } |