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com.tangosol.net
Class CompositeAddressProvider

java.lang.Object
java.util.AbstractCollection
com.tangosol.net.CompositeAddressProvider

All Implemented Interfaces:

AddressProvider, DescribableAddressProvider, SocketAddressProvider, java.lang.Iterable, java.util.Collection, java.util.Set

public class CompositeAddressProvider

extends java.util.AbstractCollection

implements DescribableAddressProvider, java.util.Set

CompositeAddressProvider is a composite of one or more AddressProviders or addresses that also implements the Set interface. This AddressProvider will provide addresses from all registered AddressProviders or Addresses.

This class implements the Set interface, but the contents are not checked to determine whether each element is unique. It is the responsibility of the user to ensure that the elements are unique if the object is used as a Set.

This implementation is thread-safe for consumers of the Set interface, but allows no more than one consumer of the AddressProvider interface.

Since:

Coherence 3.5

Author:

rhl 2008-12-05

Nested Class Summary

protected static class	CompositeAddressProvider.AddressIterator An Iterator over the addresses in this AddressProvider.
protected class	CompositeAddressProvider.SingleProvider AddressProvider wrapper for a single address dynamically added to this AddressSet.

Field Summary

protected CompositeAddressProvider.AddressIterator

m_iterInternal The default iterator used to implement the AddressProvider interface.

Constructor Summary

CompositeAddressProvider()
Default constructor.

CompositeAddressProvider(AddressProvider provider)
Construct a CompositeAddressProvider from the specified AddressProvider.

Method Summary

void	accept() This method should be called by the client immediately after it determines that it can successfully use an address returned by the SocketAddressProvider.getNextAddress() method.
boolean	add(java.lang.Object o) Ensures that this collection contains the specified element (optional operation).
void	addAddress(java.net.InetSocketAddress address) Add an address.
void	addProvider(AddressProvider provider) Add an AddressProvider.
protected CompositeAddressProvider.AddressIterator	ensureInternalIterator() Create (if necessary) and return the default iterator.
boolean	equals(java.lang.Object o) SocketAddressProvider instances are considered equivalent iff they consistently produce the same resulting set of addresses.
java.lang.String[]	getAddressDescriptions() Retrieve a human readable description of underlying addresses.
protected java.util.List	getConfiguredAddresses(AddressProvider provider) Return a list of configured addresses in the specified AddressProvider.
java.net.InetSocketAddress	getNextAddress() Covariant of SocketAddressProvider.getNextAddress() which returns an InetSocketAddress.
protected java.util.List	getProviderList() Return the provider list.
int	hashCode() Return the hash code for this AddressProvider.
java.util.Iterator	iterator() Returns an iterator over the elements contained in this collection.
void	reject(java.lang.Throwable eCause) This method should be called by the client immediately after it determines that an attempt to use an address returned by the SocketAddressProvider.getNextAddress() method has failed.
boolean	remove(java.lang.Object o) Removes the specified element from this set if it is present (optional operation).
int	size() Returns the number of elements in this collection.

Methods inherited from class java.util.AbstractCollection

addAll, clear, contains, containsAll, isEmpty, removeAll, retainAll, toArray, toArray, toString

Methods inherited from interface java.util.Set

addAll, clear, contains, containsAll, isEmpty, removeAll, retainAll, toArray, toArray

Field Detail

m_iterInternal

protected CompositeAddressProvider.AddressIterator m_iterInternal

The default iterator used to implement the AddressProvider interface.

Constructor Detail

CompositeAddressProvider

public CompositeAddressProvider()

Default constructor.

CompositeAddressProvider

public CompositeAddressProvider(AddressProvider provider)

Construct a CompositeAddressProvider from the specified AddressProvider.

Parameters:

provider - the AddressProvider to add

Method Detail

addProvider

public void addProvider(AddressProvider provider)

Add an AddressProvider.

Parameters:

provider - the AddressProvider to add

addAddress

public void addAddress(java.net.InetSocketAddress address)

Add an address.

Parameters:

address - the address to add

getProviderList

protected java.util.List getProviderList()

Return the provider list.

Returns:

the provider list

getNextAddress

public java.net.InetSocketAddress getNextAddress()

Covariant of SocketAddressProvider.getNextAddress() which returns an InetSocketAddress.

Specified by:

getNextAddress in interface AddressProvider

Specified by:

getNextAddress in interface SocketAddressProvider

Returns:

the next available address or null if the list of available addresses was exhausted

accept

public void accept()

This method should be called by the client immediately after it determines that it can successfully use an address returned by the SocketAddressProvider.getNextAddress() method.

Specified by:

accept in interface SocketAddressProvider

reject

public void reject(java.lang.Throwable eCause)

This method should be called by the client immediately after it determines that an attempt to use an address returned by the SocketAddressProvider.getNextAddress() method has failed.

Specified by:

reject in interface SocketAddressProvider

Parameters:

eCause - (optional) an exception that carries the reason why the the caller rejected the previously returned address

getAddressDescriptions

public java.lang.String[] getAddressDescriptions()

Retrieve a human readable description of underlying addresses.

Specified by:

getAddressDescriptions in interface DescribableAddressProvider

Returns:

a string array of addresses in human readable format

equals

public boolean equals(java.lang.Object o)

SocketAddressProvider instances are considered equivalent iff they consistently produce the same resulting set of addresses.

Note: the general contract of hashCode and equals() should be preserved; AddressProviders that are "equal" should produce the same hashCode.

Specified by:

equals in interface SocketAddressProvider

Specified by:

equals in interface java.util.Collection

Specified by:

equals in interface java.util.Set

Parameters:

o - the Object to compare this SocketAddressProvider to for equality

Returns:

true iff this SocketAddressProvider is equal to the specified object

hashCode

public int hashCode()

Return the hash code for this AddressProvider.

Specified by:

hashCode in interface SocketAddressProvider

Specified by:

hashCode in interface java.util.Collection

Specified by:

hashCode in interface java.util.Set

Returns:

the hash code for this AddressProvider

iterator

public java.util.Iterator iterator()

Returns an iterator over the elements contained in this collection.

Specified by:

iterator in interface java.lang.Iterable

Specified by:

iterator in interface java.util.Collection

Specified by:

iterator in interface java.util.Set

Specified by:

iterator in class java.util.AbstractCollection

Returns:

an iterator over the elements contained in this collection.

size

public int size()

Returns the number of elements in this collection. If the collection contains more than Integer.MAX_VALUE elements, returns Integer.MAX_VALUE.

Specified by:

size in interface java.util.Collection

Specified by:

size in interface java.util.Set

Specified by:

size in class java.util.AbstractCollection

Returns:

the number of elements in this collection

add

public boolean add(java.lang.Object o)

Ensures that this collection contains the specified element (optional operation). Returns true if the collection changed as a result of the call. (Returns false if this collection does not permit duplicates and already contains the specified element.) Collections that support this operation may place limitations on what elements may be added to the collection. In particular, some collections will refuse to add null elements, and others will impose restrictions on the type of elements that may be added. Collection classes should clearly specify in their documentation any restrictions on what elements may be added.

This implementation always throws an UnsupportedOperationException.

Specified by:

add in interface java.util.Collection

Specified by:

add in interface java.util.Set

Overrides:

add in class java.util.AbstractCollection

Parameters:

o - element whose presence in this collection is to be ensured.

Returns:

true if the collection changed as a result of the call.

Throws:

java.lang.UnsupportedOperationException - if the add method is not supported by this collection.

java.lang.NullPointerException - if this collection does not permit null elements, and the specified element is null.

java.lang.ClassCastException - if the class of the specified element prevents it from being added to this collection.

java.lang.IllegalArgumentException - if some aspect of this element prevents it from being added to this collection.

remove

public boolean remove(java.lang.Object o)

Removes the specified element from this set if it is present (optional operation). More formally, removes an element e such that (o==null ? e==null : o.equals(e)), if the set contains such an element. Returns true if the set contained the specified element (or equivalently, if the set changed as a result of the call). (The set will not contain the specified element once the call returns.)

Specified by:

remove in interface java.util.Collection

Specified by:

remove in interface java.util.Set

Overrides:

remove in class java.util.AbstractCollection

Parameters:

o - object to be removed from this set, if present.

Returns:

true if the set contained the specified element.

Throws:

java.lang.ClassCastException - if the type of the specified element is incompatible with this set (optional).

java.lang.NullPointerException - if the specified element is null and this set does not support null elements (optional).

java.lang.UnsupportedOperationException - if the remove method is not supported by this set.

ensureInternalIterator

protected CompositeAddressProvider.AddressIterator ensureInternalIterator()

Create (if necessary) and return the default iterator.

Returns:

the default iterator

getConfiguredAddresses

protected java.util.List getConfiguredAddresses(AddressProvider provider)

Return a list of configured addresses in the specified AddressProvider.

Parameters:

provider - the address provider

Returns:

the list of addresses

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