Package javax.jmdns.impl

Class JmDNSImpl

    • Field Detail

      • logger

        private static org.slf4j.Logger logger

      • _group

        private volatile java.net.InetAddress _group
        This is the multicast group, we are listening to for multicast DNS messages.

      • _socket

        private volatile java.net.MulticastSocket _socket
        This is our multicast socket.

      • _listeners

        private final java.util.List<DNSListener> _listeners
        Holds instances of JmDNS.DNSListener. Must by a synchronized collection, because it is updated from concurrent threads.

      • _serviceListeners

        final java.util.concurrent.ConcurrentMap<java.lang.String,​java.util.List<ListenerStatus.ServiceListenerStatus>> _serviceListeners
        Holds instances of ServiceListener's. Keys are Strings holding a fully qualified service type. Values are LinkedList's of ServiceListener's.

      • _cache

        private final DNSCache _cache
        Cache for DNSEntry's.

      • _services

        private final java.util.concurrent.ConcurrentMap<java.lang.String,​ServiceInfo> _services
        This hashtable holds the services that have been registered. Keys are instances of String which hold an all lower-case version of the fully qualified service name. Values are instances of ServiceInfo.

      • _serviceTypes

        private final java.util.concurrent.ConcurrentMap<java.lang.String,​JmDNSImpl.ServiceTypeEntry> _serviceTypes
        This hashtable holds the service types that have been registered or that have been received in an incoming datagram.
        Keys are instances of String which hold an all lower-case version of the fully qualified service type.
        Values hold the fully qualified service type.

      • _threadSleepDurationMs

        protected final long _threadSleepDurationMs

      • _shutdown

        protected java.lang.Thread _shutdown
        This is the shutdown hook, we registered with the java runtime.

      • _localHost

        private HostInfo _localHost
        Handle on the local host

      • _incomingListener

        private java.lang.Thread _incomingListener

      • _throttle

        private int _throttle
        Throttle count. This is used to count the overall number of probes sent by JmDNS. When the last throttle increment happened .

      • _lastThrottleIncrement

        private long _lastThrottleIncrement
        Last throttle increment.

      • _executor

        private final java.util.concurrent.ExecutorService _executor

      • _random

        private static final java.util.Random _random
        The source for random values. This is used to introduce random delays in responses. This reduces the potential for collisions on the network.

      • _ioLock

        private final java.util.concurrent.locks.ReentrantLock _ioLock
        This lock is used to coordinate processing of incoming and outgoing messages. This is needed, because the Rendezvous Conformance Test does not forgive race conditions.

      • _plannedAnswer

        private DNSIncoming _plannedAnswer
        If an incoming package which needs an answer is truncated, we store it here. We add more incoming DNSRecords to it, until the JmDNS.Responder timer picks it up.
        FIXME [PJYF June 8 2010]: This does not work well with multiple planned answers for packages that came in from different clients.

      • _serviceCollectors

        private final java.util.concurrent.ConcurrentMap<java.lang.String,​JmDNSImpl.ServiceCollector> _serviceCollectors
        This hashtable is used to maintain a list of service types being collected by this JmDNS instance. The key of the hashtable is a service type name, the value is an instance of JmDNS.ServiceCollector.
        See Also:
        list(java.lang.String)

      • _name

        private final java.lang.String _name

      • _recoverLock

        private final java.lang.Object _recoverLock

    • Constructor Detail

      • JmDNSImpl

        public JmDNSImpl​(java.net.InetAddress address,
                 java.lang.String name)
          throws java.io.IOException
        Create an instance of JmDNS and bind it to a specific network interface given its IP-address.
        Parameters:
        address - IP address to bind to.
        name - name of the newly created JmDNS
        Throws:
        java.io.IOException

      • JmDNSImpl

        public JmDNSImpl​(java.net.InetAddress address,
                 java.lang.String name,
                 long threadSleepDurationMs)
          throws java.io.IOException
        Create an instance of JmDNS and bind it to a specific network interface given its IP-address.
        Parameters:
        address - IP address to bind to.
        name - name of the newly created JmDNS
        threadSleepDurationMs - time in milliseconds that the JmDNS listener thread should sleep between multicast receives
        Throws:
        java.io.IOException

    • Method Detail

      • main

        public static void main​(java.lang.String[] argv)
        Main method to display API information if run from java -jar
        Parameters:
        argv - the command line arguments

      • start

        private void start​(java.util.Collection<? extends ServiceInfo> serviceInfos)

      • openMulticastSocket

        private void openMulticastSocket​(HostInfo hostInfo)
                          throws java.io.IOException
        Throws:
        java.io.IOException

      • closeMulticastSocket

        private void closeMulticastSocket()

      • advanceState

        public boolean advanceState​(DNSTask task)
        Sets the state and notifies all objects that wait on the ServiceInfo.
        Specified by:
        advanceState in interface DNSStatefulObject
        Parameters:
        task - associated task
        Returns:
        true if the state was changed by this thread, false otherwise.
        See Also:
        DNSState.advance()

      • revertState

        public boolean revertState()
        Sets the state and notifies all objects that wait on the ServiceInfo.
        Specified by:
        revertState in interface DNSStatefulObject
        Returns:
        true if the state was changed by this thread, false otherwise.
        See Also:
        DNSState.revert()

      • cancelState

        public boolean cancelState()
        Sets the state and notifies all objects that wait on the ServiceInfo.
        Specified by:
        cancelState in interface DNSStatefulObject
        Returns:
        true if the state was changed by this thread, false otherwise.

      • closeState

        public boolean closeState()
        Sets the state and notifies all objects that wait on the ServiceInfo.
        Specified by:
        closeState in interface DNSStatefulObject
        Returns:
        true if the state was changed by this thread, false otherwise.

      • recoverState

        public boolean recoverState()
        Sets the state and notifies all objects that wait on the ServiceInfo.
        Specified by:
        recoverState in interface DNSStatefulObject
        Returns:
        true if the state was changed by this thread, false otherwise.

      • associateWithTask

        public void associateWithTask​(DNSTask task,
                              DNSState state)
        Sets the task associated with this Object.
        Specified by:
        associateWithTask in interface DNSStatefulObject
        Parameters:
        task - associated task
        state - state of the task

      • removeAssociationWithTask

        public void removeAssociationWithTask​(DNSTask task)
        Remove the association of the task with this Object.
        Specified by:
        removeAssociationWithTask in interface DNSStatefulObject
        Parameters:
        task - associated task

      • isAssociatedWithTask

        public boolean isAssociatedWithTask​(DNSTask task,
                                    DNSState state)
        Checks if this object is associated with the task and in the same state.
        Specified by:
        isAssociatedWithTask in interface DNSStatefulObject
        Parameters:
        task - associated task
        state - state of the task
        Returns:
        true is the task is associated with this object, false otherwise.

      • isProbing

        public boolean isProbing()
        Returns true, if this is a probing state.
        Specified by:
        isProbing in interface DNSStatefulObject
        Returns:
        true if probing state, false otherwise

      • isAnnouncing

        public boolean isAnnouncing()
        Returns true, if this is an announcing state.
        Specified by:
        isAnnouncing in interface DNSStatefulObject
        Returns:
        true if announcing state, false otherwise

      • isAnnounced

        public boolean isAnnounced()
        Returns true, if this is an announced state.
        Specified by:
        isAnnounced in interface DNSStatefulObject
        Returns:
        true if announced state, false otherwise

      • isCanceling

        public boolean isCanceling()
        Returns true, if this is a canceling state.
        Specified by:
        isCanceling in interface DNSStatefulObject
        Returns:
        true if canceling state, false otherwise

      • isCanceled

        public boolean isCanceled()
        Returns true, if this is a canceled state.
        Specified by:
        isCanceled in interface DNSStatefulObject
        Returns:
        true if canceled state, false otherwise

      • isClosing

        public boolean isClosing()
        Returns true, if this is a closing state.
        Specified by:
        isClosing in interface DNSStatefulObject
        Returns:
        true if closing state, false otherwise

      • isClosed

        public boolean isClosed()
        Returns true, if this is a closed state.
        Specified by:
        isClosed in interface DNSStatefulObject
        Returns:
        true if closed state, false otherwise

      • waitForAnnounced

        public boolean waitForAnnounced​(long timeout)
        Waits for the object to be announced.
        Specified by:
        waitForAnnounced in interface DNSStatefulObject
        Parameters:
        timeout - the maximum time to wait in milliseconds.
        Returns:
        true if the object is announced, false otherwise

      • waitForCanceled

        public boolean waitForCanceled​(long timeout)
        Waits for the object to be canceled.
        Specified by:
        waitForCanceled in interface DNSStatefulObject
        Parameters:
        timeout - the maximum time to wait in milliseconds.
        Returns:
        true if the object is canceled, false otherwise

      • getCache

        public DNSCache getCache()
        Return the DNSCache associated with the cache variable
        Returns:
        DNS cache

      • getName

        public java.lang.String getName()
        Return the name of the JmDNS instance. This is an arbitrary string that is useful for distinguishing instances.
        Specified by:
        getName in class JmDNS
        Returns:
        name of the JmDNS

      • getHostName

        public java.lang.String getHostName()
        Return the HostName associated with this JmDNS instance. Note: May not be the same as what started. The host name is subject to negotiation.
        Specified by:
        getHostName in class JmDNS
        Returns:
        Host name

      • getLocalHost

        public HostInfo getLocalHost()
        Returns the local host info
        Returns:
        local host info

      • getInetAddress

        public java.net.InetAddress getInetAddress()
                                    throws java.io.IOException
        Return the address of the interface to which this instance of JmDNS is bound.
        Specified by:
        getInetAddress in class JmDNS
        Returns:
        Internet Address
        Throws:
        java.io.IOException - if there is an error in the underlying protocol, such as a TCP error.

      • getInterface

        @Deprecated
public java.net.InetAddress getInterface()
                                  throws java.io.IOException
        Deprecated.
        Return the address of the interface to which this instance of JmDNS is bound.
        Specified by:
        getInterface in class JmDNS
        Returns:
        Internet Address
        Throws:
        java.io.IOException - if there is an error in the underlying protocol, such as a TCP error.

      • getServiceInfo

        public ServiceInfo getServiceInfo​(java.lang.String type,
                                  java.lang.String name)
        Get service information. If the information is not cached, the method will block until updated information is received.

        Usage note: Do not call this method from the AWT event dispatcher thread. You will make the user interface unresponsive.

        Specified by:
        getServiceInfo in class JmDNS
        Parameters:
        type - fully qualified service type, such as _http._tcp.local. .
        name - unqualified service name, such as foobar .
        Returns:
        null if the service information cannot be obtained

      • getServiceInfo

        public ServiceInfo getServiceInfo​(java.lang.String type,
                                  java.lang.String name,
                                  long timeout)
        Get service information. If the information is not cached, the method will block for the given timeout until updated information is received.

        Usage note: If you call this method from the AWT event dispatcher thread, use a small timeout, or you will make the user interface unresponsive.

        Specified by:
        getServiceInfo in class JmDNS
        Parameters:
        type - full qualified service type, such as _http._tcp.local. .
        name - unqualified service name, such as foobar .
        timeout - timeout in milliseconds. Typical timeout should be 5s.
        Returns:
        null if the service information cannot be obtained

      • getServiceInfo

        public ServiceInfo getServiceInfo​(java.lang.String type,
                                  java.lang.String name,
                                  boolean persistent)
        Get service information. If the information is not cached, the method will block until updated information is received.

        Usage note: Do not call this method from the AWT event dispatcher thread. You will make the user interface unresponsive.

        Specified by:
        getServiceInfo in class JmDNS
        Parameters:
        type - fully qualified service type, such as _http._tcp.local. .
        name - unqualified service name, such as foobar .
        persistent - if true ServiceListener.resolveService will be called whenever new new information is received.
        Returns:
        null if the service information cannot be obtained

      • getServiceInfo

        public ServiceInfo getServiceInfo​(java.lang.String type,
                                  java.lang.String name,
                                  boolean persistent,
                                  long timeout)
        Get service information. If the information is not cached, the method will block for the given timeout until updated information is received.

        Usage note: If you call this method from the AWT event dispatcher thread, use a small timeout, or you will make the user interface unresponsive.

        Specified by:
        getServiceInfo in class JmDNS
        Parameters:
        type - full qualified service type, such as _http._tcp.local. .
        name - unqualified service name, such as foobar .
        persistent - if true ServiceListener.resolveService will be called whenever new new information is received.
        timeout - timeout in milliseconds. Typical timeout should be 5s.
        Returns:
        null if the service information cannot be obtained

      • resolveServiceInfo

        ServiceInfoImpl resolveServiceInfo​(java.lang.String type,
                                   java.lang.String name,
                                   java.lang.String subtype,
                                   boolean persistent)

      • getServiceInfoFromCache

        ServiceInfoImpl getServiceInfoFromCache​(java.lang.String type,
                                        java.lang.String name,
                                        java.lang.String subtype,
                                        boolean persistent)

      • waitForInfoData

        private void waitForInfoData​(ServiceInfo info,
                             long timeout)

      • requestServiceInfo

        public void requestServiceInfo​(java.lang.String type,
                               java.lang.String name)
        Request service information. The information about the service is requested and the ServiceListener.resolveService method is called as soon as it is available.

        Usage note: Do not call this method from the AWT event dispatcher thread. You will make the user interface unresponsive.

        Specified by:
        requestServiceInfo in class JmDNS
        Parameters:
        type - full qualified service type, such as _http._tcp.local. .
        name - unqualified service name, such as foobar .

      • requestServiceInfo

        public void requestServiceInfo​(java.lang.String type,
                               java.lang.String name,
                               boolean persistent)
        Request service information. The information about the service is requested and the ServiceListener.resolveService method is called as soon as it is available.

        Usage note: Do not call this method from the AWT event dispatcher thread. You will make the user interface unresponsive.

        Specified by:
        requestServiceInfo in class JmDNS
        Parameters:
        type - full qualified service type, such as _http._tcp.local. .
        name - unqualified service name, such as foobar .
        persistent - if true ServiceListener.resolveService will be called whenever new new information is received.

      • requestServiceInfo

        public void requestServiceInfo​(java.lang.String type,
                               java.lang.String name,
                               long timeout)
        Request service information. The information about the service is requested and the ServiceListener.resolveService method is called as soon as it is available.
        Specified by:
        requestServiceInfo in class JmDNS
        Parameters:
        type - full qualified service type, such as _http._tcp.local. .
        name - unqualified service name, such as foobar .
        timeout - timeout in milliseconds

      • requestServiceInfo

        public void requestServiceInfo​(java.lang.String type,
                               java.lang.String name,
                               boolean persistent,
                               long timeout)
        Request service information. The information about the service is requested and the ServiceListener.resolveService method is called as soon as it is available.
        Specified by:
        requestServiceInfo in class JmDNS
        Parameters:
        type - full qualified service type, such as _http._tcp.local. .
        name - unqualified service name, such as foobar .
        persistent - if true ServiceListener.resolveService will be called whenever new new information is received.
        timeout - timeout in milliseconds

      • handleServiceResolved

        void handleServiceResolved​(ServiceEvent event)

      • addServiceTypeListener

        public void addServiceTypeListener​(ServiceTypeListener listener)
                            throws java.io.IOException
        Listen for service types.
        Specified by:
        addServiceTypeListener in class JmDNS
        Parameters:
        listener - listener for service types
        Throws:
        java.io.IOException - if there is an error in the underlying protocol, such as a TCP error.

      • addServiceListener

        public void addServiceListener​(java.lang.String type,
                               ServiceListener listener)
        Listen for services of a given type. The type has to be a fully qualified type name such as _http._tcp.local..
        Specified by:
        addServiceListener in class JmDNS
        Parameters:
        type - full qualified service type, such as _http._tcp.local..
        listener - listener for service updates

      • addServiceListener

        private void addServiceListener​(java.lang.String type,
                                ServiceListener listener,
                                boolean synch)

      • removeServiceListener

        public void removeServiceListener​(java.lang.String type,
                                  ServiceListener listener)
        Remove listener for services of a given type.
        Specified by:
        removeServiceListener in class JmDNS
        Parameters:
        type - full qualified service type, such as _http._tcp.local..
        listener - listener for service updates

      • registerService

        public void registerService​(ServiceInfo infoAbstract)
                     throws java.io.IOException
        Register a service. The service is registered for access by other jmdns clients. The name of the service may be changed to make it unique.
        Note that the given ServiceInfo is bound to this JmDNS instance, and should not be reused for any other JmDNS.registerService(ServiceInfo).
        Specified by:
        registerService in class JmDNS
        Parameters:
        infoAbstract - service info to register
        Throws:
        java.io.IOException - if there is an error in the underlying protocol, such as a TCP error.

      • unregisterService

        public void unregisterService​(ServiceInfo infoAbstract)
        Unregister a service. The service should have been registered.

        Note: Unregistered services will not disappear form the list of services immediately. According to the specification, when unregistering services we send goodbye packets and then wait 1s before purging the cache.
        This is support for shared records that can be rescued by some other cooperation DNS. 

         Clients receiving a Multicast DNS Response with a TTL of zero SHOULD NOT immediately delete the record from the cache, but instead record a TTL of 1 and then delete the record one second later.

        Specified by:
        unregisterService in class JmDNS
        Parameters:
        infoAbstract - service info to remove

      • unregisterAllServices

        public void unregisterAllServices()
        Unregister all services.
        Specified by:
        unregisterAllServices in class JmDNS

      • registerServiceType

        public boolean registerServiceType​(java.lang.String type)
        Register a service type. If this service type was not already known, all service listeners will be notified of the new service type.

        Service types are automatically registered as they are discovered.

        Specified by:
        registerServiceType in class JmDNS
        Parameters:
        type - full qualified service type, such as _http._tcp.local..
        Returns:
        true if the type or subtype was added, false if the type was already registered.

      • makeServiceNameUnique

        private boolean makeServiceNameUnique​(ServiceInfoImpl info)
        Generate a possibly unique name for a service using the information we have in the cache.
        Returns:
        returns true, if the name of the service info had to be changed.

      • addListener

        public void addListener​(DNSListener listener,
                        DNSQuestion question)
        Add a listener for a question. The listener will receive updates of answers to the question as they arrive, or from the cache if they are already available.
        Parameters:
        listener - DSN listener
        question - DNS query

      • removeListener

        public void removeListener​(DNSListener listener)
        Remove a listener from all outstanding questions. The listener will no longer receive any updates.
        Parameters:
        listener - DSN listener

      • renewServiceCollector

        public void renewServiceCollector​(java.lang.String type)
        Renew a service when the record become stale. If there is no service collector for the type this method does nothing.
        Parameters:
        type - Service Type

      • updateRecord

        public void updateRecord​(long now,
                         DNSRecord rec,
                         JmDNSImpl.Operation operation)
        Notify all listeners that a record was updated.
        Parameters:
        now - update date
        rec - DNS record
        operation - DNS cache operation

      • removeObsoleteDnsListener

        private void removeObsoleteDnsListener​(ServiceEvent event)

      • handleRecord

        void handleRecord​(DNSRecord record,
                  long now)

      • isOlderThanOneSecond

        private boolean isOlderThanOneSecond​(DNSRecord dnsRecord,
                                     long timeToCompare)
        Parameters:
        dnsRecord -
        timeToCompare - a given times for comparison
        Returns:
        true if dnsRecord create time is older than 1 second, relative to the given time; false otherwise

      • handleResponse

        void handleResponse​(DNSIncoming msg)
             throws java.io.IOException
        Handle an incoming response. Cache answers, and pass them on to the appropriate questions.
        Throws:
        java.io.IOException

      • aRecordsLast

        private java.util.List<DNSRecord> aRecordsLast​(java.util.List<DNSRecord> allAnswers)
        In case the a record is received before the srv record the ip address would not be set.

        Wireshark record: see also file a_record_before_srv.pcapng and ServiceInfoImplTest#test_ip_address_is_set()

        Multicast Domain Name System (response) Transaction ID: 0x0000 Flags: 0x8400 Standard query response, No error Questions: 0 Answer RRs: 2 Authority RRs: 0 Additional RRs: 8 Answers _ibisip_http._tcp.local: type PTR, class IN, DeviceManagementService._ibisip_http._tcp.local _ibisip_http._tcp.local: type PTR, class IN, PassengerCountingService._ibisip_http._tcp.local Additional records DeviceManagementService._ibisip_http._tcp.local: type TXT, class IN, cache flush PassengerCountingService._ibisip_http._tcp.local: type TXT, class IN, cache flush DIST500_7-F07_OC030_05_03941.local: type A, class IN, cache flush, addr 192.168.88.236 DeviceManagementService._ibisip_http._tcp.local: type SRV, class IN, cache flush, priority 0, weight 0, port 5000, target DIST500_7-F07_OC030_05_03941.local PassengerCountingService._ibisip_http._tcp.local: type SRV, class IN, cache flush, priority 0, weight 0, port 5001, target DIST500_7-F07_OC030_05_03941.local DeviceManagementService._ibisip_http._tcp.local: type NSEC, class IN, cache flush, next domain name DeviceManagementService._ibisip_http._tcp.local PassengerCountingService._ibisip_http._tcp.local: type NSEC, class IN, cache flush, next domain name PassengerCountingService._ibisip_http._tcp.local DIST500_7-F07_OC030_05_03941.local: type NSEC, class IN, cache flush, next domain name DIST500_7-F07_OC030_05_03941.local

      • handleQuery

        void handleQuery​(DNSIncoming in,
                 java.net.InetAddress addr,
                 int port)
          throws java.io.IOException
        Handle an incoming query. See if we can answer any part of it given our service infos.
        Parameters:
        in -
        addr -
        port -
        Throws:
        java.io.IOException

      • respondToQuery

        public void respondToQuery​(DNSIncoming in)

      • addAnswer

        public DNSOutgoing addAnswer​(DNSIncoming in,
                             java.net.InetAddress addr,
                             int port,
                             DNSOutgoing out,
                             DNSRecord rec)
                      throws java.io.IOException
        Add an answer to a question. Deal with the case when the outgoing packet overflows
        Parameters:
        in -
        addr -
        port -
        out -
        rec -
        Returns:
        outgoing answer
        Throws:
        java.io.IOException

      • send

        public void send​(DNSOutgoing out)
          throws java.io.IOException
        Send an outgoing multicast DNS message.
        Parameters:
        out -
        Throws:
        java.io.IOException

      • startReaper

        public void startReaper()
        Description copied from interface: DNSTaskStarter
        Start a new reaper task. There is only supposed to be one reaper running at a time.
        Specified by:
        startReaper in interface DNSTaskStarter

      • startServiceResolver

        public void startServiceResolver​(java.lang.String type)
        Description copied from interface: DNSTaskStarter
        Start a new service resolver task
        Specified by:
        startServiceResolver in interface DNSTaskStarter
        Parameters:
        type - service type to resolve

      • startResponder

        public void startResponder​(DNSIncoming in,
                           java.net.InetAddress addr,
                           int port)
        Description copied from interface: DNSTaskStarter
        Start a new responder task
        Specified by:
        startResponder in interface DNSTaskStarter
        Parameters:
        in - incoming message
        addr - incoming address
        port - incoming port

      • recover

        public void recover()
        Recover jmDNS when there is an error.

      • __recover

        void __recover()

      • close

        public void close()
        Specified by:
        close in interface java.lang.AutoCloseable
        Specified by:
        close in interface java.io.Closeable

      • printServices

        @Deprecated
public void printServices()
        Deprecated.
        List Services and serviceTypes. Debugging Only
        Specified by:
        printServices in class JmDNS

      • toString

        public java.lang.String toString()
        Overrides:
        toString in class java.lang.Object

      • list

        public ServiceInfo[] list​(java.lang.String type)
        Returns a list of service infos of the specified type.
        Specified by:
        list in class JmDNS
        Parameters:
        type - Service type name, such as _http._tcp.local..
        Returns:
        An array of service instance.

      • list

        public ServiceInfo[] list​(java.lang.String type,
                          long timeout)
        Returns a list of service infos of the specified type.
        Specified by:
        list in class JmDNS
        Parameters:
        type - Service type name, such as _http._tcp.local..
        timeout - timeout in milliseconds. Typical timeout should be 6s.
        Returns:
        An array of service instance.

      • listBySubtype

        public java.util.Map<java.lang.String,​ServiceInfo[]> listBySubtype​(java.lang.String type)
        Returns a list of service infos of the specified type sorted by subtype. Any service that do not register a subtype is listed in the empty subtype section.
        Specified by:
        listBySubtype in class JmDNS
        Parameters:
        type - Service type name, such as _http._tcp.local..
        Returns:
        A dictionary of service info by subtypes.

      • listBySubtype

        public java.util.Map<java.lang.String,​ServiceInfo[]> listBySubtype​(java.lang.String type,
                                                                         long timeout)
        Returns a list of service infos of the specified type sorted by subtype. Any service that do not register a subtype is listed in the empty subtype section.
        Specified by:
        listBySubtype in class JmDNS
        Parameters:
        type - Service type name, such as _http._tcp.local..
        timeout - timeout in milliseconds. Typical timeout should be 6s.
        Returns:
        A dictionary of service info by subtypes.

      • disposeServiceCollectors

        private void disposeServiceCollectors()
        This method disposes all ServiceCollector instances which have been created by calls to method list(type).
        See Also:
        list(java.lang.String)

      • toUnqualifiedName

        static java.lang.String toUnqualifiedName​(java.lang.String type,
                                          java.lang.String qualifiedName)

      • getServices

        public java.util.Map<java.lang.String,​ServiceInfo> getServices()

      • setLastThrottleIncrement

        public void setLastThrottleIncrement​(long lastThrottleIncrement)

      • getLastThrottleIncrement

        public long getLastThrottleIncrement()

      • setThrottle

        public void setThrottle​(int throttle)

      • getThrottle

        public int getThrottle()

      • getRandom

        public static java.util.Random getRandom()

      • ioLock

        public void ioLock()

      • ioUnlock

        public void ioUnlock()

      • setPlannedAnswer

        public void setPlannedAnswer​(DNSIncoming plannedAnswer)

      • getPlannedAnswer

        public DNSIncoming getPlannedAnswer()

      • setLocalHost

        void setLocalHost​(HostInfo localHost)

      • getSocket

        public java.net.MulticastSocket getSocket()

      • getGroup

        public java.net.InetAddress getGroup()

      • getDelegate

        public JmDNS.Delegate getDelegate()
        Description copied from class: JmDNS
        Returns the instance delegate
        Specified by:
        getDelegate in class JmDNS
        Returns:
        instance delegate

      • setDelegate

        public JmDNS.Delegate setDelegate​(JmDNS.Delegate delegate)
        Description copied from class: JmDNS
        Sets the instance delegate
        Specified by:
        setDelegate in class JmDNS
        Parameters:
        delegate - new instance delegate
        Returns:
        previous instance delegate