mirror of https://github.com/milvus-io/milvus.git
120 lines
3.4 KiB
Go
120 lines
3.4 KiB
Go
package resource
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import (
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"reflect"
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clientv3 "go.etcd.io/etcd/client/v3"
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"github.com/milvus-io/milvus/internal/metastore"
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"github.com/milvus-io/milvus/internal/streamingnode/client/manager"
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"github.com/milvus-io/milvus/internal/types"
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"github.com/milvus-io/milvus/internal/util/idalloc"
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"github.com/milvus-io/milvus/pkg/log"
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"github.com/milvus-io/milvus/pkg/util/syncutil"
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"github.com/milvus-io/milvus/pkg/util/typeutil"
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)
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var r *resourceImpl // singleton resource instance
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// optResourceInit is the option to initialize the resource.
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type optResourceInit func(r *resourceImpl)
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// OptETCD provides the etcd client to the resource.
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func OptETCD(etcd *clientv3.Client) optResourceInit {
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return func(r *resourceImpl) {
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r.etcdClient = etcd
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}
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}
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// OptRootCoordClient provides the root coordinator client to the resource.
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func OptRootCoordClient(rootCoordClient *syncutil.Future[types.RootCoordClient]) optResourceInit {
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return func(r *resourceImpl) {
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r.rootCoordClient = rootCoordClient
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r.idAllocator = idalloc.NewIDAllocator(r.rootCoordClient)
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}
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}
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// OptStreamingCatalog provides streaming catalog to the resource.
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func OptStreamingCatalog(catalog metastore.StreamingCoordCataLog) optResourceInit {
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return func(r *resourceImpl) {
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r.streamingCatalog = catalog
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}
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}
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// Init initializes the singleton of resources.
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// Should be call when streaming node startup.
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func Init(opts ...optResourceInit) {
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newR := &resourceImpl{
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logger: log.With(log.FieldModule(typeutil.StreamingCoordRole)),
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}
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for _, opt := range opts {
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opt(newR)
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}
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assertNotNil(newR.IDAllocator())
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assertNotNil(newR.RootCoordClient())
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assertNotNil(newR.ETCD())
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assertNotNil(newR.StreamingCatalog())
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newR.streamingNodeManagerClient = manager.NewManagerClient(newR.etcdClient)
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assertNotNil(newR.StreamingNodeManagerClient())
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r = newR
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}
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// Resource access the underlying singleton of resources.
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func Resource() *resourceImpl {
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return r
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}
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// resourceImpl is a basic resource dependency for streamingnode server.
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// All utility on it is concurrent-safe and singleton.
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type resourceImpl struct {
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idAllocator idalloc.Allocator
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rootCoordClient *syncutil.Future[types.RootCoordClient]
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etcdClient *clientv3.Client
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streamingCatalog metastore.StreamingCoordCataLog
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streamingNodeManagerClient manager.ManagerClient
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logger *log.MLogger
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}
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// RootCoordClient returns the root coordinator client.
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func (r *resourceImpl) RootCoordClient() *syncutil.Future[types.RootCoordClient] {
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return r.rootCoordClient
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}
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// IDAllocator returns the IDAllocator client.
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func (r *resourceImpl) IDAllocator() idalloc.Allocator {
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return r.idAllocator
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}
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// StreamingCatalog returns the StreamingCatalog client.
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func (r *resourceImpl) StreamingCatalog() metastore.StreamingCoordCataLog {
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return r.streamingCatalog
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}
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// ETCD returns the etcd client.
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func (r *resourceImpl) ETCD() *clientv3.Client {
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return r.etcdClient
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}
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// StreamingNodeClient returns the streaming node client.
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func (r *resourceImpl) StreamingNodeManagerClient() manager.ManagerClient {
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return r.streamingNodeManagerClient
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}
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func (r *resourceImpl) Logger() *log.MLogger {
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return r.logger
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}
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// assertNotNil panics if the resource is nil.
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func assertNotNil(v interface{}) {
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iv := reflect.ValueOf(v)
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if !iv.IsValid() {
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panic("nil resource")
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}
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switch iv.Kind() {
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case reflect.Ptr, reflect.Slice, reflect.Map, reflect.Func, reflect.Interface:
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if iv.IsNil() {
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panic("nil resource")
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}
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}
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}
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