Package com.mongodb.connection

Class ServerDescription

java.lang.Object
com.mongodb.connection.ServerDescription
@Immutable public class ServerDescription extends Object
Immutable snapshot state of a server.
Since:
3.0

  • Field Details

    • MIN_DRIVER_SERVER_VERSION

      public static final String MIN_DRIVER_SERVER_VERSION
      The minimum supported driver server version
      Since:
      3.8
      See Also:

    • MIN_DRIVER_WIRE_VERSION

      public static final int MIN_DRIVER_WIRE_VERSION
      The minimum supported driver wire version
      Since:
      3.8
      See Also:

    • MAX_DRIVER_WIRE_VERSION

      public static final int MAX_DRIVER_WIRE_VERSION
      The maximum supported driver wire version
      Since:
      3.8
      See Also:

  • Method Details

    • builder

      public static ServerDescription.Builder builder()
      Gets a Builder for creating a new ServerDescription instance.
      Returns:
      a new Builder for ServerDescription.

    • builder

      public static ServerDescription.Builder builder(ServerDescription serverDescription)
      Creates a Builder for a ServerDescription instance based on a previous serverDescription.
      Parameters:
      serverDescription - the ServerDescription to base the builder from
      Returns:
      a new Builder for ServerDescription.
      Since:
      4.1

    • getCanonicalAddress

      @Nullable public String getCanonicalAddress()
      Gets the string representing the host name and port that this member of a replica set was configured with, e.g. "somehost:27019". This is typically derived from the "me" field from the "hello" command response.
      Returns:
      the host name and port that this replica set member is configured with.

    • getLogicalSessionTimeoutMinutes

      @Nullable public Integer getLogicalSessionTimeoutMinutes()
      Gets the session timeout in minutes.
      Returns:
      the session timeout in minutes, or null if sessions are not supported by this server
      Since:
      3.6
      Since server release
      3.6

    • isHelloOk

      public boolean isHelloOk()
      Gets whether this server supports the "hello" command. The default is false.
      Returns:
      true if this server supports the "hello" command.
      Since:
      4.3
      Since server release
      5.0

    • isCompatibleWithDriver

      public boolean isCompatibleWithDriver()
      Return whether the server is compatible with the driver. An incompatible server is one that has a min wire version greater that the driver's max wire version or a max wire version less than the driver's min wire version.

      A load balancer is always deemed to be compatible.

      Returns:
      true if the server is compatible with the driver.

    • isIncompatiblyNewerThanDriver

      public boolean isIncompatiblyNewerThanDriver()
      Return whether the server is compatible with the driver. An incompatible server is one that has a min wire version greater that the driver's max wire version or a max wire version less than the driver's min wire version.

      A load balancer is always deemed to be compatible.

      Returns:
      true if the server is compatible with the driver.
      Since:
      3.6

    • isIncompatiblyOlderThanDriver

      public boolean isIncompatiblyOlderThanDriver()
      Return whether the server is compatible with the driver. An incompatible server is one that has a min wire version greater that the driver's max wire version or a max wire version less than the driver's min wire version.

      A load balancer is always deemed to be compatible.

      Returns:
      true if the server is compatible with the driver.
      Since:
      3.6

    • getDefaultMaxDocumentSize

      public static int getDefaultMaxDocumentSize()
      Get the default maximum document size.
      Returns:
      the default maximum document size

    • getDefaultMinWireVersion

      public static int getDefaultMinWireVersion()
      Get the default minimum wire version
      Returns:
      the default minimum wire version

    • getDefaultMaxWireVersion

      public static int getDefaultMaxWireVersion()
      Get the default maximum wire version
      Returns:
      the default maximum wire version

    • getAddress

      public ServerAddress getAddress()
      Gets the address of this server
      Returns:
      a ServerAddress containing the details of the address of this server.

    • isReplicaSetMember

      public boolean isReplicaSetMember()
      Gets whether this server is a replica set member.
      Returns:
      true if this server is part of a replica set

    • isShardRouter

      public boolean isShardRouter()
      Gets whether this is a server that is the entry point to a sharded instance of MongoDB.
      Returns:
      true if this server is a mongos instance

    • isStandAlone

      public boolean isStandAlone()
      Gets whether this is part of a replica set/sharded system, or is a single server.
      Returns:
      true if this is a single server

    • isPrimary

      public boolean isPrimary()
      Returns whether this can be treated as a primary server.
      Returns:
      true if this server is the primary in a replica set, is a mongos, a load balancer, or is a single standalone server

    • isSecondary

      public boolean isSecondary()
      Returns whether this can be treated as a secondary server.
      Returns:
      true if this server is a secondary in a replica set, is a mongos, a load balancer, or is a single standalone server

    • isCryptd

      public boolean isCryptd()
      Returns whether this server is mongocryptd.
      Returns:
      true if this server is a mongocryptd.

    • getHosts

      public Set<String> getHosts()
      Get a Set of strings in the format of "[hostname]:[port]" that contains all members of the replica set that are neither hidden, passive, nor arbiters.
      Returns:
      all members of the replica set that are neither hidden, passive, nor arbiters.

    • getPassives

      public Set<String> getPassives()
      Gets the passive members of the replica set.
      Returns:
      A set of strings in the format of "[hostname]:[port]" listing all members of the replica set which have a priority of 0.

    • getArbiters

      public Set<String> getArbiters()
      Gets the arbiters in the replica set
      Returns:
      A Set of strings in the format of "[hostname]:[port]" containing all members of the replica set that are arbiters.

    • getPrimary

      @Nullable public String getPrimary()
      Gets the address of the current primary in the replica set
      Returns:
      A string in the format of "[hostname]:[port]" listing the current primary member of the replica set.

    • getMaxDocumentSize

      public int getMaxDocumentSize()
      The maximum permitted size of a BSON object in bytes for this mongod process. Defaults to 16MB.
      Returns:
      the maximum size a document can be

    • getTagSet

      public TagSet getTagSet()
      A set of all tags assigned to this member.
      Returns:
      a TagSet with all the tags for this server.

    • getMinWireVersion

      public int getMinWireVersion()
      The earliest version of the wire protocol that this MongoDB server is capable of using to communicate with clients.
      Returns:
      the minimum protocol version supported by this server

    • getMaxWireVersion

      public int getMaxWireVersion()
      The latest version of the wire protocol that this MongoDB server is capable of using to communicate with clients.
      Returns:
      the maximum protocol version supported by this server

    • getElectionId

      @Nullable public ObjectId getElectionId()
      The replica set electionid reported by this MongoDB server.
      Returns:
      the electionId, which may be null

    • getSetVersion

      @Nullable public Integer getSetVersion()
      The replica set setVersion reported by this MongoDB server.
      Returns:
      the setVersion, which may be null

    • getTopologyVersion

      @Nullable public TopologyVersion getTopologyVersion()
      The topologyVersion reported by this MongoDB server.
      Returns:
      the topologyVersion, which may be null
      Since:
      4.1
      Since server release
      4.4

    • getLastWriteDate

      @Nullable public Date getLastWriteDate()
      Gets the last write date.
      Returns:
      the last write date, which may be null
      Since:
      3.4
      Since server release
      3.4

    • getLastUpdateTime

      public long getLastUpdateTime(TimeUnit timeUnit)
      Gets the time that this server description was created, using a monotonic clock like System.nanoTime().
      Parameters:
      timeUnit - the time unit
      Returns:
      the last update time in the given unit
      Since:
      3.4

    • hasTags

      public boolean hasTags(TagSet desiredTags)
      Returns true if the server has the given tags. A server of either type ServerType.STANDALONE or ServerType.SHARD_ROUTER is considered to have all tags, so this method will always return true for instances of either of those types.
      Parameters:
      desiredTags - the tags
      Returns:
      true if this server has the given tags

    • getSetName

      @Nullable public String getSetName()
      Gets the name of the replica set
      Returns:
      the name of the replica set

    • isOk

      public boolean isOk()
      The isOK() result from requesting this information from the server
      Returns:
      true if the request executed correctly

    • getState

      public ServerConnectionState getState()
      Gets the current state of the connection to the server.
      Returns:
      ServerConnectionState representing whether the server has been successfully connected to

    • getType

      public ServerType getType()
      Gets the type of the server, for example whether it's a standalone or in a replica set.
      Returns:
      the server type

    • getClusterType

      public ClusterType getClusterType()
      Gets the type of the cluster this server is in (for example, replica set).
      Returns:
      a ClusterType representing the type of the cluster this server is in

    • getRoundTripTimeNanos

      public long getRoundTripTimeNanos()
      Get the weighted average time it took to make the round trip for requesting this information from the server in nanoseconds.
      Returns:
      the time taken to request the information, in nano seconds

    • getMinRoundTripTimeNanos

      @Alpha(CLIENT) public long getMinRoundTripTimeNanos()
      Get the recent min time it took to make the round trip for requesting this information from the server in nanoseconds.
      Returns:
      the recent min time taken to request the information, in nano seconds
      Since:
      5.2

    • getException

      @Nullable public Throwable getException()
      Gets the exception thrown while attempting to determine the server description. This is useful for diagnostic purposed when determining the root cause of a connectivity failure.
      Returns:
      the exception, which may be null

    • equals

      public boolean equals(Object o)
      Overrides:
      equals in class Object

    • hashCode

      public int hashCode()
      Overrides:
      hashCode in class Object

    • toString

      public String toString()
      Overrides:
      toString in class Object

    • getShortDescription

      public String getShortDescription()
      Returns a short, pretty description for this ServerDescription.
      Returns:
      a String containing the most pertinent information about this ServerDescription