mirror of
https://github.com/etcd-io/etcd.git
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122 lines
3.3 KiB
Go
122 lines
3.3 KiB
Go
// Copyright 2020 The etcd Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// 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
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package integration
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import (
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"log"
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"net/http"
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"sync"
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"time"
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"go.etcd.io/etcd/client/pkg/v3/testutil"
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"go.etcd.io/etcd/client/pkg/v3/transport"
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"go.etcd.io/etcd/tests/v3/framework/integration"
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)
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// Infrastructure to provision a single shared cluster for tests - only
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// when its needed.
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//
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// See ./tests/integration/clientv3/examples/main_test.go for canonical usage.
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// Please notice that the shared (LazyCluster's) state is preserved between
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// testcases, so left-over state might has cross-testcase effects.
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// Prefer dedicated clusters for substancial test-cases.
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type LazyCluster interface {
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// EndpointsV2 - exposes connection points for client v2.
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// Calls to this method might initialize the cluster.
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EndpointsV2() []string
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// EndpointsV3 - exposes connection points for client v3.
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// Calls to this method might initialize the cluster.
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EndpointsV3() []string
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// Cluster - calls to this method might initialize the cluster.
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Cluster() *integration.Cluster
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// Transport - call to this method might initialize the cluster.
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Transport() *http.Transport
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Terminate()
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TB() testutil.TB
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}
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type lazyCluster struct {
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cfg integration.ClusterConfig
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cluster *integration.Cluster
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transport *http.Transport
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once sync.Once
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tb testutil.TB
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closer func()
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}
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// NewLazyCluster returns a new test cluster handler that gets created on the
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// first call to GetEndpoints() or GetTransport()
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func NewLazyCluster() LazyCluster {
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return NewLazyClusterWithConfig(integration.ClusterConfig{Size: 1})
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}
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// NewLazyClusterWithConfig returns a new test cluster handler that gets created
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// on the first call to GetEndpoints() or GetTransport()
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func NewLazyClusterWithConfig(cfg integration.ClusterConfig) LazyCluster {
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tb, closer := testutil.NewTestingTBProthesis("lazy_cluster")
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return &lazyCluster{cfg: cfg, tb: tb, closer: closer}
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}
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func (lc *lazyCluster) mustLazyInit() {
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lc.once.Do(func() {
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var err error
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lc.transport, err = transport.NewTransport(transport.TLSInfo{}, time.Second)
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if err != nil {
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log.Fatal(err)
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}
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lc.cluster = integration.NewCluster(lc.tb, &lc.cfg)
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})
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}
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func (lc *lazyCluster) Terminate() {
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lc.tb.Logf("Terminating...")
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if lc != nil && lc.cluster != nil {
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lc.cluster.Terminate(nil)
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lc.cluster = nil
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}
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if lc.closer != nil {
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lc.tb.Logf("Closer...")
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lc.closer()
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}
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}
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func (lc *lazyCluster) EndpointsV2() []string {
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return []string{lc.Cluster().Members[0].URL()}
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}
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func (lc *lazyCluster) EndpointsV3() []string {
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return lc.Cluster().Client(0).Endpoints()
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}
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func (lc *lazyCluster) Cluster() *integration.Cluster {
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lc.mustLazyInit()
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return lc.cluster
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}
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func (lc *lazyCluster) Transport() *http.Transport {
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lc.mustLazyInit()
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return lc.transport
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}
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func (lc *lazyCluster) TB() testutil.TB {
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return lc.tb
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}
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