ignite系列之18-Ignite 分布式锁

Ignite 事务会隐式获得分布式锁，但是有的场景可能需要显式获得锁。IgniteCacheAPI 的

lock()方法会返回 java.util.concurrent.locks.Lock 的实例，其可以获得指定键的显式分布式锁，

通过 IgniteCache.lockAll()方法，也可以在一个集合对象上获得锁。

使用代码示例：

IgniteCache<Object, Object> personCache = ignite.getOrCreateCache(cacheName);

Lock lock = personCache.lock(keyValue);

boolean acquiredLock = false;

try {

long timeout = 60;

acquiredLock = lock.tryLock(timeout, TimeUnit.SECONDS);

if(acquiredLock) {

transactionMethod(keyValue);

}else{

//重试获取锁，或者抛出异常

throw new RuntimeException("Failed to acquired lock for key=" + keyValue

+ " in " + timeout + " " + TimeUnit.SECONDS.name());

}

} catch (InterruptedException e) {

LOG.warn("Failed to acquired lock for key=" + keyValue + ",errorMsg:" + e.getMessage());

throw new RuntimeException(e);

} finally {

if(acquiredLock) {

lock.unlock();

}

}