content: /*
   * Copyright (C) 2020 ActiveJ LLC.
   *
   * 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.
   */
  
  package io.activej.rpc.client.jmx;
  
  import io.activej.common.time.CurrentTimeProvider;
  import io.activej.jmx.api.attribute.JmxAttribute;
  import org.jetbrains.annotations.Nullable;
  
  import java.time.Duration;
  import java.time.Instant;
  
  public final class RpcConnectStats {
  	private final CurrentTimeProvider now;
  
  	private long successfulConnects;
  	private long failedConnects;
  
  	private int reconnectAttempts;
  	private long connectionLostAt;
  
  	public RpcConnectStats(CurrentTimeProvider now) {
  		this.now = now;
  	}
  
  	public void reset() {
  		successfulConnects = failedConnects = 0;
  		reconnectAttempts = 0;
  		connectionLostAt = -1;
  	}
  
  	public void recordSuccessfulConnect() {
  		successfulConnects++;
  		reconnectAttempts = 0;
  		connectionLostAt = -1;
  	}
  
  	public void recordFailedConnect() {
  		failedConnects++;
  		if (connectionLostAt == -1) {
  			connectionLostAt = now.currentTimeMillis();
  		} else {
  			reconnectAttempts++;
  		}
  	}
  
  	@JmxAttribute
  	public long getSuccessfulConnects() {
  		return successfulConnects;
  	}
  
  	@JmxAttribute
  	public long getFailedConnects() {
  		return failedConnects;
  	}
  
  	@JmxAttribute
  	public boolean isConnected() {
  		return connectionLostAt == -1;
  	}
  
  	@JmxAttribute
  	public @Nullable Duration getConnectionLostFor() {
  		if (connectionLostAt == -1) return null;
  
  		return Duration.ofMillis(now.currentTimeMillis() - connectionLostAt);
  	}
  
  	@JmxAttribute
  	public @Nullable Instant getConnectionLostAt() {
  		if (connectionLostAt == -1) return null;
  
  		return Instant.ofEpochMilli(connectionLostAt);
  	}
  
  	@JmxAttribute
  	public int getReconnectAttempts() {
  		return reconnectAttempts;
  	}
  }
  