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planner, executor: support Change and ChangeExec (#9789)
* support update pump or drainer status
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,60 @@ | ||
| // Copyright 2019 PingCAP, Inc. | ||
| // | ||
| // Licensed 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, | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
|
||
| package executor | ||
|
|
||
| import ( | ||
| "context" | ||
| "strings" | ||
|
|
||
| "github.com/pingcap/errors" | ||
| "github.com/pingcap/parser/ast" | ||
| "github.com/pingcap/tidb-tools/tidb-binlog/node" | ||
| "github.com/pingcap/tidb/config" | ||
| "github.com/pingcap/tidb/util/chunk" | ||
| ) | ||
|
|
||
| // ChangeExec represents a change executor. | ||
| type ChangeExec struct { | ||
| baseExecutor | ||
| *ast.ChangeStmt | ||
| } | ||
|
|
||
| // Next implements the Executor Next interface. | ||
| func (e *ChangeExec) Next(ctx context.Context, req *chunk.RecordBatch) error { | ||
| kind := strings.ToLower(e.NodeType) | ||
| urls := config.GetGlobalConfig().Path | ||
| registry, err := createRegistry(urls) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| nodes, _, err := registry.Nodes(ctx, node.NodePrefix[kind]) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| state := e.State | ||
| nodeID := e.NodeID | ||
| for _, n := range nodes { | ||
| if n.NodeID != nodeID { | ||
| continue | ||
| } | ||
| switch state { | ||
| case node.Online, node.Pausing, node.Paused, node.Closing, node.Offline: | ||
| n.State = state | ||
| return registry.UpdateNode(ctx, node.NodePrefix[kind], n) | ||
| default: | ||
| return errors.Errorf("state %s is illegal", state) | ||
| } | ||
| } | ||
| return errors.NotFoundf("node %s, id %s from etcd %s", kind, nodeID, urls) | ||
| } |
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