java mongodb连接配置实践——生产环境最优

connectionPoolSettings = ConnectionPoolSettings.builder()
.minSize(getMinConnectionsPerHost())
.maxSize(getConnectionsPerHost())
.maxWaitQueueSize(getThreadsAllowedToBlockForConnectionMultiplier()
* getConnectionsPerHost())
.maxWaitTime(getMaxWaitTime(), MILLISECONDS)
.maxConnectionIdleTime(getMaxConnectionIdleTime(), MILLISECONDS)
.maxConnectionLifeTime(getMaxConnectionLifeTime(), MILLISECONDS)
.build();

public static class Builder {
private String description;
private String applicationName;
//读取偏好, 这里默认的是从主节点读取.
private ReadPreference readPreference = ReadPreference.primary();
//使用服务器默认的写关注?
private WriteConcern writeConcern = WriteConcern.ACKNOWLEDGED;
//使用服务的默认读关注,默认是local
private ReadConcern readConcern = ReadConcern.DEFAULT;
private CodecRegistry codecRegistry = MongoClient.getDefaultCodecRegistry();
private final List<CommandListener> commandListeners = new ArrayList<CommandListener>();
private final List<ClusterListener> clusterListeners = new ArrayList<ClusterListener>();
private final List<ServerListener> serverListeners = new ArrayList<ServerListener>();
private final List<ServerMonitorListener> serverMonitorListeners = new ArrayList<ServerMonitorListener>(); private int minConnectionsPerHost;
private int maxConnectionsPerHost = 100;
private int threadsAllowedToBlockForConnectionMultiplier = 5;
//设置服务器选择超时（以毫秒为单位），它定义驱动程序在抛出异常之前等待服务器选择成功的时间
//值为0表示如果没有可用的服务器，它将立即超时。 负值意味着无限期等待
private int serverSelectionTimeout = 1000 * 30;
//线程等待连接变为可用的最长时间
private int maxWaitTime = 1000 * 60 * 2;
// 线程池中连接的最大空闲时间
private int maxConnectionIdleTime;
private int maxConnectionLifeTime;
//连接超时时间,必须大于0
private int connectTimeout = 1000 * 10;
//socket超时时间
private int socketTimeout = 0;
//socket是否保活
private boolean socketKeepAlive = false;
private boolean sslEnabled = false;
private boolean sslInvalidHostNameAllowed = false;
private boolean alwaysUseMBeans = false;
//设置心跳频率。 这是驱动程序将尝试确定群集中每个服务器的当前状态的频率。 默认值为10,000毫秒
private int heartbeatFrequency = 10000;
//设置最小心跳频率。 如果驱动程序必须经常重新检查服务器的可用性，它将至少在上一次检查后等待很长时间，以避免浪费精力。 默认值为500毫秒。
private int minHeartbeatFrequency = 500;
//设置用于集群心跳的连接的连接超时
private int heartbeatConnectTimeout = 20000;
//设置用于集群心跳的连接的套接字超时
private int heartbeatSocketTimeout = 20000;
//本地阈值
private int localThreshold = 15; private String requiredReplicaSetName;
private DBDecoderFactory dbDecoderFactory = DefaultDBDecoder.FACTORY;
private DBEncoderFactory dbEncoderFactory = DefaultDBEncoder.FACTORY;
private SocketFactory socketFactory;
private boolean cursorFinalizerEnabled = true;
...}