/
cluster_invoker.go
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/
cluster_invoker.go
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/*
* 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 available
import (
"context"
"fmt"
)
import (
"github.com/pkg/errors"
)
import (
"dubbo.apache.org/dubbo-go/v3/cluster/cluster/base"
"dubbo.apache.org/dubbo-go/v3/cluster/directory"
"dubbo.apache.org/dubbo-go/v3/protocol"
)
type availableClusterInvoker struct {
base.BaseClusterInvoker
}
// NewClusterInvoker returns a availableCluster invoker instance
func NewClusterInvoker(directory directory.Directory) protocol.Invoker {
return &availableClusterInvoker{
BaseClusterInvoker: base.NewBaseClusterInvoker(directory),
}
}
func (invoker *availableClusterInvoker) Invoke(ctx context.Context, invocation protocol.Invocation) protocol.Result {
invokers := invoker.Directory.List(invocation)
err := invoker.CheckInvokers(invokers, invocation)
if err != nil {
return &protocol.RPCResult{Err: err}
}
err = invoker.CheckWhetherDestroyed()
if err != nil {
return &protocol.RPCResult{Err: err}
}
for _, ivk := range invokers {
if ivk.IsAvailable() {
return ivk.Invoke(ctx, invocation)
}
}
return &protocol.RPCResult{Err: errors.New(fmt.Sprintf("no provider available in %v", invokers))}
}