eu.dnetlib.scholix.api.index

Class Pool<T>

java.lang.Object

eu.dnetlib.scholix.api.index.Pool<T>

Type Parameters:

T - the type parameter

All Implemented Interfaces:

Cloneable

Direct Known Subclasses:

ElasticSearchPool

public class Pool<T>
extends Object
implements Cloneable

When using the Java High Level REST Client provided by the Elasticsearch official website, it is found that there is no in the client API. Connecting to connect the pool, create a new connection every time, this is impact in high concurrency situation, so it is ready to be on the client API increases the concept of pool. Fortunately, we don't need to turn your weight to write the implementation of the connection pool, because Apache provides us with the general framework of the connection pool. Commons-pool2, and we only need to implement some logic according to the frame design. Used in the REDIS client API Jedispool is based on Commons-pool2 implementation. Let's take a look at how to achieve it. First we have to create a pool class, this pool introduces GenericObjectPool in Commons-pool2 through dependent manner. In this class In, we define how to borrow objects and returns objects from the pool.

Field Summary

Fields

Modifier and Type	Field and Description
protected org.apache.commons.pool2.impl.GenericObjectPool<T>	internalPool The Internal pool.

Constructor Summary

Constructors

Constructor and Description
Pool() Instantiates a new Pool.
Pool(org.apache.commons.pool2.impl.GenericObjectPoolConfig poolConfig, org.apache.commons.pool2.PooledObjectFactory<T> factory) Instantiates a new Pool.

Method Summary

Modifier and Type	Method and Description
void	addObjects(int count) Add objects.
protected void	closeInternalPool() Close internal pool.
void	destroy() Destroy.
long	getMaxBorrowWaitTimeMillis() Gets max borrow wait time millis.
long	getMeanBorrowWaitTimeMillis() Gets mean borrow wait time millis.
int	getNumActive() Gets num active.
int	getNumIdle() Gets num idle.
int	getNumWaiters() Gets num waiters.
T	getResource() Gets resource.
void	initPool(org.apache.commons.pool2.impl.GenericObjectPoolConfig poolConfig, org.apache.commons.pool2.PooledObjectFactory<T> factory) Init pool.
void	returnBrokenResource(T resource) Return broken resource.
void	returnResource(T resource) Return resource.

Methods inherited from class java.lang.Object

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

Field Detail

internalPool

protected org.apache.commons.pool2.impl.GenericObjectPool<T> internalPool

The Internal pool.

Constructor Detail

Pool

public Pool()

Instantiates a new Pool.

Pool

public Pool(org.apache.commons.pool2.impl.GenericObjectPoolConfig poolConfig,
            org.apache.commons.pool2.PooledObjectFactory<T> factory)

Instantiates a new Pool.

Parameters:

poolConfig - the pool config

factory - the factory

Method Detail

initPool

public void initPool(org.apache.commons.pool2.impl.GenericObjectPoolConfig poolConfig,
                     org.apache.commons.pool2.PooledObjectFactory<T> factory)

Init pool.

Parameters:

poolConfig - the pool config

factory - the factory

closeInternalPool

protected void closeInternalPool()
                          throws ScholixException

Close internal pool.

Throws:

ScholixException - the scholix exception

getResource

public T getResource()
              throws ScholixException

Gets resource.

Returns:

the resource

Throws:

ScholixException - the scholix exception

returnResource

public void returnResource(T resource)
                    throws ScholixException

Return resource.

Parameters:

resource - the resource

Throws:

ScholixException - the scholix exception

returnBrokenResource

public void returnBrokenResource(T resource)
                          throws ScholixException

Return broken resource.

Parameters:

resource - the resource

Throws:

ScholixException - the scholix exception

destroy

public void destroy()
             throws ScholixException

Destroy.

Throws:

ScholixException - the scholix exception

getNumActive

public int getNumActive()

Gets num active.

Returns:

the num active

getNumIdle

public int getNumIdle()

Gets num idle.

Returns:

the num idle

getNumWaiters

public int getNumWaiters()

Gets num waiters.

Returns:

the num waiters

getMeanBorrowWaitTimeMillis

public long getMeanBorrowWaitTimeMillis()

Gets mean borrow wait time millis.

Returns:

the mean borrow wait time millis

getMaxBorrowWaitTimeMillis

public long getMaxBorrowWaitTimeMillis()

Gets max borrow wait time millis.

Returns:

the max borrow wait time millis

addObjects

public void addObjects(int count)
                throws Exception

Add objects.

Parameters:

count - the count

Throws:

Exception - the exception