br.com.objectos.git
Class GitService

java.lang.Object
  br.com.objectos.git.GitService

All Implemented Interfaces:

GitExecutor

public final class GitService
extends Object
implements GitExecutor

A class for supporting the execution of GitCommand instances.

A GitService allows for the execution of Git commands by offering the required parameters of the GitCommand.submitAsync(GitCommandExecutor, CpuWorker) method.

Additionally, a GitService allows for configuring a number values that influence, among others, its memory footprint and concurrency level.

Applications will typically have one instance of this class per JVM.

Creation example

The following is a code example showing how to obtain a new instance of a GitService. It creates a new instance using the default values for all of the configuration options:

GitService service;
 service = GitService.create(cpuArray, ioWorker);
 

The next example explicitly sets all configuration options with the default values. Therefore, the previous and the next example are equivalent:

GitService service;
 service = GitService.create(
     cpuArray,

     ioWorker,

     GitService.bufferSize(4096),

     GitService.enginesPerWorker(1),

     GitService.logger(NoopLogger.getInstance())
 );
 

Since:

3

Nested Class Summary

static class

GitService.Option A GitService configuration option.

Method Summary

static GitService.Option	bufferSize(int size) The size in bytes of the internal buffers of each GitEngine in this service.
static GitService	create(CpuArray cpuArray, IoWorker ioWorker, GitService.Option... options) Creates a new GitService instance configured with the provided values.
static GitService.Option	enginesPerWorker(int value) The number of GitEngine instances per CpuWorker.
static GitService.Option	logger(br.com.objectos.logging.Logger logger) The logger instance to be used by this service (and by all of the GitEngine instances).
<V> Computation<V>	submit(GitCommand<V> command) Submits the specified command to be executed asynchronously.

Methods inherited from class java.lang.Object

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

Method Detail

bufferSize

public static GitService.Option bufferSize(int size)

The size in bytes of the internal buffers of each GitEngine in this service.

Parameters:

size - the size in bytes

Returns:

a new option that sets the buffer size to the specified value

Throws:

IllegalArgumentException - if size < 64

See Also:

create(CpuArray, IoWorker, Option...), GitEngine.bufferSize(int)

create

public static GitService create(CpuArray cpuArray,
                                IoWorker ioWorker,
                                GitService.Option... options)

Creates a new GitService instance configured with the provided values.

Options are provided by static methods in this class. The available options are:

Options provided by the GitService class

Method name	Description	Default value
bufferSize	The size in bytes of the buffers used by each GitEngine in this service	4096
enginesPerWorker	The number of GitEngine instances per CpuWorker. It defines the concurrency level per CpuWorker.	1
logger	The logger instance to use	NoopLogger.getInstance()

Parameters:

cpuArray - the CPU worker array to be used by this Git service

ioWorker - the I/O worker

options - the additional configuration options

Returns:

a new GitService instance configured with the provided values

enginesPerWorker

public static GitService.Option enginesPerWorker(int value)

The number of GitEngine instances per CpuWorker.

For each CpuWorker in the CpuArray used to create this service, the specified value of GitEngines are created. For example, if a GitService is created with:

• a cpu array containing 4 cpu workers; and
• a value of 3 engines per worker.

The service will contain a total of 12 GitEngine instances, three for each thread (cpu worker). Therefore, in this example, each thread will be able to run, at most, three concurrent Git tasks.

Parameters:

value - the number of engines per worker to set

Returns:

a new option that sets the engines per worker to the specified value

Throws:

IllegalArgumentException - if value <= 0

See Also:

create(CpuArray, IoWorker, Option...)

logger

public static GitService.Option logger(br.com.objectos.logging.Logger logger)

The logger instance to be used by this service (and by all of the GitEngine instances).

Parameters:

logger - the logger instance

Returns:

a new option that sets the logger instance to the specified value

submit

public final <V> Computation<V> submit(GitCommand<V> command)

Submits the specified command to be executed asynchronously.

Specified by:

submit in interface GitExecutor

Type Parameters:

V - the type of the command result

Parameters:

command - the command to be executed

Returns:

a GitComputation representing the possibly ongoing execution of the command