pip_services4_logic 0.0.2

Logic Components for Pip.Services in Dart. This framework is part of the [Pip.Services](https://github.com/pip-services/pip-services) project.

example/README.md

Examples for Bussiness Logic Components

This library has an extensive set of components for working in various fields when creating microservices, micro-applications and applications. It includes:

• Build - factories

• Cache - distributed cache

• Example:

void main(){
    String KEY1 = 'key1';
    String VALUE1 = 'value1';

    var _cache = MemoryCache();
     try {
      await _cache.store('123', KEY1, VALUE1, 5000);
    } catch (err) {
      //...
    }

    try {
      var val = await _cache.retrieve('123', KEY1);
      // Expect VALUE1
    } catch (err) {
        //...
    }
}

• Lock - distributed locks

• Example:

void main() async {
    final String LOCK1 = 'lock_1';
    var _lock = MemoryLock();
    // Try to acquire lock for the first time
    try {
      var result = await _lock.tryAcquireLock('123', LOCK1, 3000);
      // result True
    } catch (err) {
      //...
    }
    // Try to acquire lock for the second time
    try {
      var result = await _lock.tryAcquireLock('123', LOCK1, 3000);
      // result False
    } catch (err) {
      //...
    }
    // Release the lock
    await _lock.releaseLock('123', LOCK1);
    // Try to acquire lock for the third time
    try {
      var result = await _lock.tryAcquireLock('123', LOCK1, 3000);
      // result True
    } catch (err) {
     //...
    }
    await _lock.releaseLock('123', LOCK1);
}

In the help for each class there is a general example of its use. Also one of the quality sources are the source code for the tests.