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/*
 * ====================================================================
 * 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.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * .
 *
 */
package org.apache.http.pool;

import org.apache.http.annotation.ThreadingBehavior;
import org.apache.http.annotation.Contract;

import java.io.Serializable;

/**
 * Pool statistics.
 * 

* The total number of connections in the pool is equal to {@code available} plus {@code leased}. *

* * @since 4.2 */ @Contract(threading = ThreadingBehavior.IMMUTABLE) public class PoolStats implements Serializable { private static final long serialVersionUID = -2807686144795228544L; private final int leased; private final int pending; private final int available; private final int max; public PoolStats(final int leased, final int pending, final int free, final int max) { super(); this.leased = leased; this.pending = pending; this.available = free; this.max = max; } /** * Gets the number of persistent connections tracked by the connection manager currently being used to execute * requests. *

* The total number of connections in the pool is equal to {@code available} plus {@code leased}. *

* * @return the number of persistent connections. */ public int getLeased() { return this.leased; } /** * Gets the number of connection requests being blocked awaiting a free connection. This can happen only if there * are more worker threads contending for fewer connections. * * @return the number of connection requests being blocked awaiting a free connection. */ public int getPending() { return this.pending; } /** * Gets the number idle persistent connections. *

* The total number of connections in the pool is equal to {@code available} plus {@code leased}. *

* * @return number idle persistent connections. */ public int getAvailable() { return this.available; } /** * Gets the maximum number of allowed persistent connections. * * @return the maximum number of allowed persistent connections. */ public int getMax() { return this.max; } @Override public String toString() { final StringBuilder buffer = new StringBuilder(); buffer.append("[leased: "); buffer.append(this.leased); buffer.append("; pending: "); buffer.append(this.pending); buffer.append("; available: "); buffer.append(this.available); buffer.append("; max: "); buffer.append(this.max); buffer.append("]"); return buffer.toString(); } }




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