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12 results

cell_wrapper.py

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  • registry_aware_cluster_invoker.go 1.87 KiB
    /*
     * Licensed to the Apache Software Foundation (ASF) under one or more
     * contributor license agreements.  See the NOTICE file distributed with
     * this work for additional information regarding copyright ownership.
     * The ASF licenses this file to You under the Apache License, Version 2.0
     * (the "License"); you may not use this file except in compliance with
     * the License.  You may obtain a copy of the License at
     *
     *     http://www.apache.org/licenses/LICENSE-2.0
     *
     * Unless required by applicable law or agreed to in writing, software
     * distributed under the License is distributed on an "AS IS" BASIS,
     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     * See the License for the specific language governing permissions and
     * limitations under the License.
     */
    
    package cluster_impl
    
    import (
    	"context"
    )
    import (
    	"github.com/apache/dubbo-go/cluster"
    	"github.com/apache/dubbo-go/common/constant"
    	"github.com/apache/dubbo-go/protocol"
    )
    
    type registryAwareClusterInvoker struct {
    	baseClusterInvoker
    }
    
    func newRegistryAwareClusterInvoker(directory cluster.Directory) protocol.Invoker {
    	return &registryAwareClusterInvoker{
    		baseClusterInvoker: newBaseClusterInvoker(directory),
    	}
    }
    
    func (invoker *registryAwareClusterInvoker) Invoke(ctx context.Context, invocation protocol.Invocation) protocol.Result {
    	invokers := invoker.directory.List(invocation)
    	//First, pick the invoker (XXXClusterInvoker) that comes from the local registry, distinguish by a 'default' key.
    	for _, invoker := range invokers {
    		if invoker.IsAvailable() && invoker.GetUrl().GetParam(constant.REGISTRY_DEFAULT_KEY, "false") == "true" {
    			return invoker.Invoke(ctx, invocation)
    		}
    	}
    
    	//If none of the invokers has a local signal, pick the first one available.
    	for _, invoker := range invokers {
    		if invoker.IsAvailable() {
    			return invoker.Invoke(ctx, invocation)
    		}
    	}
    	return nil
    }