mirror of https://github.com/milvus-io/milvus.git
258 lines
8.2 KiB
Go
258 lines
8.2 KiB
Go
// Copyright (C) 2019-2020 Zilliz. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance
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// with the License. You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software distributed under the License
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// is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
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// or implied. See the License for the specific language governing permissions and limitations under the License.
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package grpcqueryserviceclient
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import (
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"context"
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"fmt"
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"time"
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grpc_middleware "github.com/grpc-ecosystem/go-grpc-middleware"
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grpc_retry "github.com/grpc-ecosystem/go-grpc-middleware/retry"
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grpc_opentracing "github.com/grpc-ecosystem/go-grpc-middleware/tracing/opentracing"
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"github.com/milvus-io/milvus/internal/util/retry"
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"github.com/milvus-io/milvus/internal/util/sessionutil"
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"github.com/milvus-io/milvus/internal/util/trace"
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"github.com/milvus-io/milvus/internal/util/typeutil"
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"go.uber.org/zap"
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"google.golang.org/grpc"
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"github.com/milvus-io/milvus/internal/log"
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"github.com/milvus-io/milvus/internal/proto/commonpb"
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"github.com/milvus-io/milvus/internal/proto/internalpb"
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"github.com/milvus-io/milvus/internal/proto/milvuspb"
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"github.com/milvus-io/milvus/internal/proto/querypb"
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)
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type Client struct {
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ctx context.Context
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grpcClient querypb.QueryServiceClient
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conn *grpc.ClientConn
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addr string
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timeout time.Duration
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sess *sessionutil.Session
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reconnTry int
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recallTry int
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}
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func getQueryServiceAddress(sess *sessionutil.Session) (string, error) {
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key := typeutil.QueryServiceRole
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msess, _, err := sess.GetSessions(key)
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if err != nil {
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log.Debug("QueryServiceClient GetSessions failed", zap.Error(err))
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return "", err
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}
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ms, ok := msess[key]
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if !ok {
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log.Debug("QueryServiceClient msess key not existed", zap.Any("key", key))
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return "", fmt.Errorf("number of queryservice is incorrect, %d", len(msess))
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}
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return ms.Address, nil
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}
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// NewClient creates a client for QueryService grpc call.
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func NewClient(metaRootPath string, etcdEndpoints []string, timeout time.Duration) (*Client, error) {
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sess := sessionutil.NewSession(context.Background(), metaRootPath, etcdEndpoints)
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return &Client{
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ctx: context.Background(),
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grpcClient: nil,
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conn: nil,
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timeout: timeout,
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reconnTry: 10,
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recallTry: 3,
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sess: sess,
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}, nil
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}
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func (c *Client) Init() error {
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// for now, we must try many times in Init Stage
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initFunc := func() error {
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return c.connect()
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}
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err := retry.Retry(10000, 3*time.Second, initFunc)
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return err
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}
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func (c *Client) connect() error {
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var err error
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getQueryServiceAddressFn := func() error {
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c.addr, err = getQueryServiceAddress(c.sess)
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if err != nil {
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return err
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}
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return nil
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}
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err = retry.Retry(c.reconnTry, 3*time.Second, getQueryServiceAddressFn)
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if err != nil {
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log.Debug("QueryServiceClient getQueryServiceAddress failed", zap.Error(err))
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return err
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}
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connectGrpcFunc := func() error {
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ctx, cancelFunc := context.WithTimeout(c.ctx, c.timeout)
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defer cancelFunc()
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opts := trace.GetInterceptorOpts()
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log.Debug("QueryServiceClient try reconnect ", zap.String("address", c.addr))
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conn, err := grpc.DialContext(ctx, c.addr, grpc.WithInsecure(), grpc.WithBlock(),
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grpc.WithUnaryInterceptor(
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grpc_middleware.ChainUnaryClient(
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grpc_retry.UnaryClientInterceptor(),
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grpc_opentracing.UnaryClientInterceptor(opts...),
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)),
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grpc.WithStreamInterceptor(
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grpc_middleware.ChainStreamClient(
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grpc_retry.StreamClientInterceptor(),
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grpc_opentracing.StreamClientInterceptor(opts...),
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)),
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)
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if err != nil {
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return err
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}
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c.conn = conn
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return nil
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}
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err = retry.Retry(c.reconnTry, 500*time.Millisecond, connectGrpcFunc)
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if err != nil {
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log.Debug("QueryServiceClient try reconnect failed", zap.Error(err))
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return err
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}
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log.Debug("QueryServiceClient try reconnect success")
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c.grpcClient = querypb.NewQueryServiceClient(c.conn)
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return nil
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}
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func (c *Client) recall(caller func() (interface{}, error)) (interface{}, error) {
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ret, err := caller()
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if err == nil {
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return ret, nil
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}
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for i := 0; i < c.reconnTry; i++ {
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err = c.connect()
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if err == nil {
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break
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}
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}
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if err != nil {
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return nil, err
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}
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ret, err = caller()
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if err == nil {
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return ret, nil
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}
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return ret, err
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}
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func (c *Client) Start() error {
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return nil
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}
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func (c *Client) Stop() error {
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return c.conn.Close()
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}
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// Register dummy
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func (c *Client) Register() error {
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return nil
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}
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func (c *Client) GetComponentStates(ctx context.Context) (*internalpb.ComponentStates, error) {
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ret, err := c.recall(func() (interface{}, error) {
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return c.grpcClient.GetComponentStates(ctx, &internalpb.GetComponentStatesRequest{})
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})
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return ret.(*internalpb.ComponentStates), err
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}
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func (c *Client) GetTimeTickChannel(ctx context.Context) (*milvuspb.StringResponse, error) {
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ret, err := c.recall(func() (interface{}, error) {
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return c.grpcClient.GetTimeTickChannel(ctx, &internalpb.GetTimeTickChannelRequest{})
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})
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return ret.(*milvuspb.StringResponse), err
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}
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func (c *Client) GetStatisticsChannel(ctx context.Context) (*milvuspb.StringResponse, error) {
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ret, err := c.recall(func() (interface{}, error) {
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return c.grpcClient.GetStatisticsChannel(ctx, &internalpb.GetStatisticsChannelRequest{})
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})
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return ret.(*milvuspb.StringResponse), err
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}
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func (c *Client) RegisterNode(ctx context.Context, req *querypb.RegisterNodeRequest) (*querypb.RegisterNodeResponse, error) {
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ret, err := c.recall(func() (interface{}, error) {
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return c.grpcClient.RegisterNode(ctx, req)
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})
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return ret.(*querypb.RegisterNodeResponse), err
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}
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func (c *Client) ShowCollections(ctx context.Context, req *querypb.ShowCollectionsRequest) (*querypb.ShowCollectionsResponse, error) {
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ret, err := c.recall(func() (interface{}, error) {
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return c.grpcClient.ShowCollections(ctx, req)
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})
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return ret.(*querypb.ShowCollectionsResponse), err
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}
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func (c *Client) LoadCollection(ctx context.Context, req *querypb.LoadCollectionRequest) (*commonpb.Status, error) {
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ret, err := c.recall(func() (interface{}, error) {
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return c.grpcClient.LoadCollection(ctx, req)
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})
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return ret.(*commonpb.Status), err
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}
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func (c *Client) ReleaseCollection(ctx context.Context, req *querypb.ReleaseCollectionRequest) (*commonpb.Status, error) {
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ret, err := c.recall(func() (interface{}, error) {
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return c.grpcClient.ReleaseCollection(ctx, req)
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})
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return ret.(*commonpb.Status), err
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}
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func (c *Client) ShowPartitions(ctx context.Context, req *querypb.ShowPartitionsRequest) (*querypb.ShowPartitionsResponse, error) {
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ret, err := c.recall(func() (interface{}, error) {
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return c.grpcClient.ShowPartitions(ctx, req)
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})
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return ret.(*querypb.ShowPartitionsResponse), err
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}
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func (c *Client) LoadPartitions(ctx context.Context, req *querypb.LoadPartitionsRequest) (*commonpb.Status, error) {
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ret, err := c.recall(func() (interface{}, error) {
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return c.grpcClient.LoadPartitions(ctx, req)
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})
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return ret.(*commonpb.Status), err
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}
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func (c *Client) ReleasePartitions(ctx context.Context, req *querypb.ReleasePartitionsRequest) (*commonpb.Status, error) {
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ret, err := c.recall(func() (interface{}, error) {
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return c.grpcClient.ReleasePartitions(ctx, req)
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})
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return ret.(*commonpb.Status), err
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}
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func (c *Client) CreateQueryChannel(ctx context.Context, req *querypb.CreateQueryChannelRequest) (*querypb.CreateQueryChannelResponse, error) {
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ret, err := c.recall(func() (interface{}, error) {
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return c.grpcClient.CreateQueryChannel(ctx, req)
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})
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return ret.(*querypb.CreateQueryChannelResponse), err
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}
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func (c *Client) GetPartitionStates(ctx context.Context, req *querypb.GetPartitionStatesRequest) (*querypb.GetPartitionStatesResponse, error) {
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ret, err := c.recall(func() (interface{}, error) {
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return c.grpcClient.GetPartitionStates(ctx, req)
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})
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return ret.(*querypb.GetPartitionStatesResponse), err
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}
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func (c *Client) GetSegmentInfo(ctx context.Context, req *querypb.GetSegmentInfoRequest) (*querypb.GetSegmentInfoResponse, error) {
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ret, err := c.recall(func() (interface{}, error) {
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return c.grpcClient.GetSegmentInfo(ctx, req)
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})
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return ret.(*querypb.GetSegmentInfoResponse), err
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}
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