com.newrelic.agent

Class LazyMapImpl<K,V>

java.lang.Object

com.newrelic.agent.LazyMapImpl<K,V>

All Implemented Interfaces:

java.util.Map<K,V>

public class LazyMapImpl<K,V>
extends java.lang.Object
implements java.util.Map<K,V>

A Map implementation that performs lazy initialization of the actual map. Because this class relies on Guava's MapMaker, it does not allow null key or values. This class is thread safe.

Nested Class Summary

Nested classes/interfaces inherited from interface java.util.Map

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

Constructor Summary

Constructors

Constructor and Description
LazyMapImpl() Create a lazy map with a small initial size, concurrently accessible by only 1 thread.
LazyMapImpl(int initialSize) Create a lazy map with a given initial size, concurrently accessible by only 1 thread.
LazyMapImpl(com.google.common.collect.MapMaker factory) Create a lazy map of your own design

Method Summary

Modifier and Type	Method and Description
void	clear() Clear the parameters.
boolean	containsKey(java.lang.Object key)
boolean	containsValue(java.lang.Object value)
java.util.Set<java.util.Map.Entry<K,V>>	entrySet()
V	get(java.lang.Object key) Get a parameter.
boolean	isEmpty()
java.util.Set<K>	keySet()
V	put(K key, V value) Put a parameter.
void	putAll(java.util.Map<? extends K,? extends V> params) Copy parameters from the given map.
V	remove(java.lang.Object key) Remove a parameter.
int	size()
java.util.Collection<V>	values()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface java.util.Map

compute, computeIfAbsent, computeIfPresent, equals, forEach, getOrDefault, hashCode, merge, putIfAbsent, remove, replace, replace, replaceAll

Constructor Detail

LazyMapImpl

public LazyMapImpl()

Create a lazy map with a small initial size, concurrently accessible by only 1 thread.

LazyMapImpl

public LazyMapImpl(int initialSize)

Create a lazy map with a given initial size, concurrently accessible by only 1 thread.

LazyMapImpl

public LazyMapImpl(com.google.common.collect.MapMaker factory)

Create a lazy map of your own design

Parameters:

factory - a MapMaker, preconfigured to construct the desired map.

Method Detail

put

public V put(K key,
             V value)

Put a parameter.

Specified by:

put in interface java.util.Map<K,V>

Returns:

the previous parameter value (null if it did not exist)

putAll

public void putAll(java.util.Map<? extends K,? extends V> params)

Copy parameters from the given map.

Specified by:

putAll in interface java.util.Map<K,V>

Parameters:

params - parameters to be copied

remove

public V remove(java.lang.Object key)

Remove a parameter.

Specified by:

remove in interface java.util.Map<K,V>

Returns:

the previous parameter value (null if it did not exist)

get

public V get(java.lang.Object key)

Get a parameter.

Specified by:

get in interface java.util.Map<K,V>

Returns:

the parameter value (null if it did not exist)

clear

public void clear()

Clear the parameters.

Specified by:

clear in interface java.util.Map<K,V>

size

public int size()

Specified by:

size in interface java.util.Map<K,V>

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface java.util.Map<K,V>

containsKey

public boolean containsKey(java.lang.Object key)

Specified by:

containsKey in interface java.util.Map<K,V>

containsValue

public boolean containsValue(java.lang.Object value)

Specified by:

containsValue in interface java.util.Map<K,V>

keySet

public java.util.Set<K> keySet()

Specified by:

keySet in interface java.util.Map<K,V>

values

public java.util.Collection<V> values()

Specified by:

values in interface java.util.Map<K,V>

entrySet

public java.util.Set<java.util.Map.Entry<K,V>> entrySet()

Specified by:

entrySet in interface java.util.Map<K,V>