javax.jmdns.impl

类 DNSCache

java.lang.Object

java.util.AbstractMap<K,V>

java.util.concurrent.ConcurrentHashMap<java.lang.String,java.util.List<DNSEntry>>

javax.jmdns.impl.DNSCache

所有已实现的接口:

java.io.Serializable, java.util.concurrent.ConcurrentMap<java.lang.String,java.util.List<DNSEntry>>, java.util.Map<java.lang.String,java.util.List<DNSEntry>>

public class DNSCache
extends java.util.concurrent.ConcurrentHashMap<java.lang.String,java.util.List<DNSEntry>>

A table of DNS entries. This is a map table which can handle multiple entries with the same name.

Storing multiple entries with the same name is implemented using a linked list. This is hidden from the user and can change in later implementation.

Here's how to iterate over all entries:

       for (Iterator i=dnscache.allValues().iterator(); i.hasNext(); ) {
             DNSEntry entry = i.next();
             ...do something with entry...
       }
 

And here's how to iterate over all entries having a given name:

       for (Iterator i=dnscache.getDNSEntryList(name).iterator(); i.hasNext(); ) {
             DNSEntry entry = i.next();
           ...do something with entry...
       }
 

作者:

Arthur van Hoff, Werner Randelshofer, Rick Blair, Pierre Frisch

另请参阅:

序列化表格

嵌套类概要

从类继承的嵌套类/接口 java.util.concurrent.ConcurrentHashMap

java.util.concurrent.ConcurrentHashMap.KeySetView<K,V>

从类继承的嵌套类/接口 java.util.AbstractMap

java.util.AbstractMap.SimpleEntry<K,V>, java.util.AbstractMap.SimpleImmutableEntry<K,V>

从接口继承的嵌套类/接口 java.util.Map

java.util.Map.Entry<K,V>

构造器概要

构造器

构造器和说明
DNSCache()
DNSCache(DNSCache map)
DNSCache(int initialCapacity) Create a table with a given initial size.

方法概要

限定符和类型	方法和说明
boolean	addDNSEntry(DNSEntry dnsEntry) Adds an entry to the table.
java.util.Collection<DNSEntry>	allValues() Returns all entries in the cache
protected java.lang.Object	clone()
DNSEntry	getDNSEntry(DNSEntry dnsEntry) Get a matching DNS entry from the table (using isSameEntry).
DNSEntry	getDNSEntry(java.lang.String name, DNSRecordType type, DNSRecordClass recordClass) Get a matching DNS entry from the table.
java.util.Collection<? extends DNSEntry>	getDNSEntryList(java.lang.String name) Iterate only over items with matching name.
java.util.Collection<? extends DNSEntry>	getDNSEntryList(java.lang.String name, DNSRecordType type, DNSRecordClass recordClass) Get all matching DNS entries from the table.
void	logCachedContent() Prints the content of the cache to the logger.
boolean	removeDNSEntry(DNSEntry dnsEntry) Removes a specific entry from the table.
boolean	replaceDNSEntry(DNSEntry newDNSEntry, DNSEntry existingDNSEntry) Replace an existing entry by a new one.
java.lang.String	toString()

从类继承的方法 java.util.concurrent.ConcurrentHashMap

clear, compute, computeIfAbsent, computeIfPresent, contains, containsKey, containsValue, elements, entrySet, equals, forEach, forEach, forEach, forEachEntry, forEachEntry, forEachKey, forEachKey, forEachValue, forEachValue, get, getOrDefault, hashCode, isEmpty, keys, keySet, keySet, mappingCount, merge, newKeySet, newKeySet, put, putAll, putIfAbsent, reduce, reduceEntries, reduceEntries, reduceEntriesToDouble, reduceEntriesToInt, reduceEntriesToLong, reduceKeys, reduceKeys, reduceKeysToDouble, reduceKeysToInt, reduceKeysToLong, reduceToDouble, reduceToInt, reduceToLong, reduceValues, reduceValues, reduceValuesToDouble, reduceValuesToInt, reduceValuesToLong, remove, remove, replace, replace, replaceAll, search, searchEntries, searchKeys, searchValues, size, values

从类继承的方法 java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

构造器详细资料

DNSCache

public DNSCache()

DNSCache

public DNSCache(DNSCache map)

参数:

map -

DNSCache

public DNSCache(int initialCapacity)

Create a table with a given initial size.

参数:

initialCapacity -

方法详细资料

clone

protected java.lang.Object clone()
                          throws java.lang.CloneNotSupportedException

覆盖:

clone 在类中 java.util.AbstractMap<java.lang.String,java.util.List<DNSEntry>>

抛出:

java.lang.CloneNotSupportedException

allValues

public java.util.Collection<DNSEntry> allValues()

Returns all entries in the cache

返回:

all entries in the cache

getDNSEntryList

public java.util.Collection<? extends DNSEntry> getDNSEntryList(java.lang.String name)

Iterate only over items with matching name. Returns an list of DNSEntry or null. To retrieve all entries, one must iterate over this linked list.

参数:

name -

返回:

list of DNSEntries

getDNSEntry

public DNSEntry getDNSEntry(DNSEntry dnsEntry)

Get a matching DNS entry from the table (using isSameEntry). Returns the entry that was found.

参数:

dnsEntry -

返回:

DNSEntry

getDNSEntry

public DNSEntry getDNSEntry(java.lang.String name,
                            DNSRecordType type,
                            DNSRecordClass recordClass)

Get a matching DNS entry from the table.

参数:

name -

type -

recordClass -

返回:

DNSEntry

getDNSEntryList

public java.util.Collection<? extends DNSEntry> getDNSEntryList(java.lang.String name,
                                                                DNSRecordType type,
                                                                DNSRecordClass recordClass)

Get all matching DNS entries from the table.

参数:

name -

type -

recordClass -

返回:

list of entries

addDNSEntry

public boolean addDNSEntry(DNSEntry dnsEntry)

Adds an entry to the table.

参数:

dnsEntry -

返回:

true if the entry was added

removeDNSEntry

public boolean removeDNSEntry(DNSEntry dnsEntry)

Removes a specific entry from the table. Returns true if the entry was found.

参数:

dnsEntry -

返回:

true if the entry was removed

replaceDNSEntry

public boolean replaceDNSEntry(DNSEntry newDNSEntry,
                               DNSEntry existingDNSEntry)

Replace an existing entry by a new one.
Note: the 2 entries must have the same key.

参数:

newDNSEntry -

existingDNSEntry -

返回:

true if the entry has been replace, false otherwise.

toString

public java.lang.String toString()

覆盖:

toString 在类中 java.util.concurrent.ConcurrentHashMap<java.lang.String,java.util.List<DNSEntry>>

logCachedContent

public void logCachedContent()

Prints the content of the cache to the logger.