Java Code Examples for com.alibaba.dubbo.common.utils.Holder#set()

The following examples show how to use com.alibaba.dubbo.common.utils.Holder#set() . You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example 1
Source File: ExtensionLoader.java    From dubbo-2.6.5 with Apache License 2.0 6 votes vote down vote up 
/**
 * Find the extension with the given name. If the specified name is not found, then {@link IllegalStateException}
 * will be thrown.查找具有给定名称的扩展名。如果没有找到指定的名称，那么将抛出IllegalStateException。
 */
@SuppressWarnings("unchecked")
public T getExtension(String name) {
    if (name == null || name.length() == 0)
        throw new IllegalArgumentException("Extension name == null");
    if ("true".equals(name)) {
        return getDefaultExtension();
    }
    Holder<Object> holder = cachedInstances.get(name);
    if (holder == null) {
        cachedInstances.putIfAbsent(name, new Holder<Object>());
        holder = cachedInstances.get(name);
    }
    Object instance = holder.get();
    if (instance == null) {
        synchronized (holder) {
            instance = holder.get();
            if (instance == null) {
                instance = createExtension(name);
                holder.set(instance);
            }
        }
    }
    return (T) instance;
}
Example 2
Source File: ExtensionLoader.java    From dubbox with Apache License 2.0 6 votes vote down vote up 
/**
    * 返回指定名字的扩展。如果指定名字的扩展不存在，则抛异常 {@link IllegalStateException}.
    *
    * @param name
    * @return
    */
@SuppressWarnings("unchecked")
public T getExtension(String name) {
	if (name == null || name.length() == 0)
	    throw new IllegalArgumentException("Extension name == null");
	if ("true".equals(name)) {
	    return getDefaultExtension();
	}
	Holder<Object> holder = cachedInstances.get(name);
	if (holder == null) {
	    cachedInstances.putIfAbsent(name, new Holder<Object>());
	    holder = cachedInstances.get(name);
	}
	Object instance = holder.get();
	if (instance == null) {
	    synchronized (holder) {
            instance = holder.get();
            if (instance == null) {
                instance = createExtension(name);
                holder.set(instance);
            }
        }
	}
	return (T) instance;
}
Example 3
Source File: ExtensionLoader.java    From dubbox-hystrix with Apache License 2.0 6 votes vote down vote up 
/**
    * 返回指定名字的扩展。如果指定名字的扩展不存在，则抛异常 {@link IllegalStateException}.
    *
    * @param name
    * @return
    */
@SuppressWarnings("unchecked")
public T getExtension(String name) {
	if (name == null || name.length() == 0)
	    throw new IllegalArgumentException("Extension name == null");
	if ("true".equals(name)) {
	    return getDefaultExtension();
	}
	Holder<Object> holder = cachedInstances.get(name);
	if (holder == null) {
	    cachedInstances.putIfAbsent(name, new Holder<Object>());
	    holder = cachedInstances.get(name);
	}
	Object instance = holder.get();
	if (instance == null) {
	    synchronized (holder) {
            instance = holder.get();
            if (instance == null) {
                instance = createExtension(name);
                holder.set(instance);
            }
        }
	}
	return (T) instance;
}
Example 4
Source File: ExtensionLoader.java    From dubbo3 with Apache License 2.0 6 votes vote down vote up 
/**
 * 返回指定名字的扩展。如果指定名字的扩展不存在，则抛异常 {@link IllegalStateException}.
 *
 * @param name extension name
 * @return extension
 */
@SuppressWarnings("unchecked")
public T getExtension(String name) {
    if (name == null || name.length() == 0)
        throw new IllegalArgumentException("Extension name == null");
    if ("true".equals(name)) {
        return getDefaultExtension();
    }
    Holder<Object> holder = cachedInstances.get(name);
    if (holder == null) {
        cachedInstances.putIfAbsent(name, new Holder<Object>());
        holder = cachedInstances.get(name);
    }
    Object instance = holder.get();
    if (instance == null) {
        synchronized (holder) {
            instance = holder.get();
            if (instance == null) {
                instance = createExtension(name);
                holder.set(instance);
            }
        }
    }
    return (T) instance;
}
Example 5
Source File: ExtensionLoader.java    From dubbox with Apache License 2.0 6 votes vote down vote up 
/**
    * 返回指定名字的扩展。如果指定名字的扩展不存在，则抛异常 {@link IllegalStateException}.
    *
    * @param name
    * @return
    */
@SuppressWarnings("unchecked")
public T getExtension(String name) {
	if (name == null || name.length() == 0)
	    throw new IllegalArgumentException("Extension name == null");
	if ("true".equals(name)) {
	    return getDefaultExtension();
	}
	Holder<Object> holder = cachedInstances.get(name);
	if (holder == null) {
	    cachedInstances.putIfAbsent(name, new Holder<Object>());
	    holder = cachedInstances.get(name);
	}
	Object instance = holder.get();
	if (instance == null) {
	    synchronized (holder) {
            instance = holder.get();
            if (instance == null) {
                instance = createExtension(name);
                holder.set(instance);
            }
        }
	}
	return (T) instance;
}
Example 6
Source File: ExtensionLoader.java    From dubbox with Apache License 2.0 6 votes vote down vote up 
/**
    * 返回指定名字的扩展。如果指定名字的扩展不存在，则抛异常 {@link IllegalStateException}.
    *
    * @param name
    * @return
    */
@SuppressWarnings("unchecked")
public T getExtension(String name) {
	if (name == null || name.length() == 0)
	    throw new IllegalArgumentException("Extension name == null");
	if ("true".equals(name)) {
	    return getDefaultExtension();
	}
	Holder<Object> holder = cachedInstances.get(name);
	if (holder == null) {
	    cachedInstances.putIfAbsent(name, new Holder<Object>());
	    holder = cachedInstances.get(name);
	}
	Object instance = holder.get();
	if (instance == null) {
	    synchronized (holder) {
            instance = holder.get();
            if (instance == null) {
                instance = createExtension(name);
                holder.set(instance);
            }
        }
	}
	return (T) instance;
}