k8s.io/perf-tests/clusterloader2@v0.0.0-20240304094227-64bdb12da87e/pkg/state/namespaces_state.go (about)

     1  /*
     2  Copyright 2018 The Kubernetes Authors.
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8      http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package state
    18  
    19  import (
    20  	"fmt"
    21  	"sync"
    22  
    23  	"k8s.io/perf-tests/clusterloader2/api"
    24  )
    25  
    26  // InstancesState represents state of object replicas.
    27  type InstancesState struct {
    28  	DesiredReplicaCount int32
    29  	CurrentReplicaCount int32
    30  	Object              *api.Object
    31  }
    32  
    33  // InstancesIdentifier is a unique identifier for object replicas group
    34  type InstancesIdentifier struct {
    35  	Basename   string
    36  	ObjectKind string
    37  	APIGroup   string
    38  }
    39  
    40  // namespaceState represents state of a single namespace.
    41  type namespaceState map[InstancesIdentifier]*InstancesState
    42  
    43  // NamespacesState represents state of all used namespaces.
    44  type NamespacesState struct {
    45  	lock            sync.RWMutex
    46  	namespaceStates map[string]namespaceState
    47  }
    48  
    49  // newNamespacesState creates new namespaces state.
    50  func newNamespacesState() *NamespacesState {
    51  	return &NamespacesState{
    52  		namespaceStates: make(map[string]namespaceState),
    53  	}
    54  }
    55  
    56  // Get returns state of object instances -
    57  // number of existing replicas and its configuration.
    58  func (ns *NamespacesState) Get(namespace string, identifier InstancesIdentifier) (*InstancesState, bool) {
    59  	ns.lock.RLock()
    60  	defer ns.lock.RUnlock()
    61  	namespaceState, exists := ns.namespaceStates[namespace]
    62  	if !exists {
    63  		return nil, false
    64  	}
    65  	instances, exists := namespaceState[identifier]
    66  	return instances, exists
    67  }
    68  
    69  // Set stores information about object instances state
    70  // to test state.
    71  func (ns *NamespacesState) Set(namespace string, identifier InstancesIdentifier, instances *InstancesState) {
    72  	ns.lock.Lock()
    73  	defer ns.lock.Unlock()
    74  	_, exists := ns.namespaceStates[namespace]
    75  	if !exists {
    76  		ns.namespaceStates[namespace] = make(namespaceState)
    77  	}
    78  	ns.namespaceStates[namespace][identifier] = instances
    79  }
    80  
    81  // Delete removes information about given instances.
    82  // It there is no information for given object it is assumed that
    83  // there are no object replicas.
    84  func (ns *NamespacesState) Delete(namespace string, identifier InstancesIdentifier) error {
    85  	ns.lock.Lock()
    86  	defer ns.lock.Unlock()
    87  	namespaceState, exists := ns.namespaceStates[namespace]
    88  	if !exists {
    89  		return fmt.Errorf("namespace %v not found", namespace)
    90  	}
    91  	_, exists = namespaceState[identifier]
    92  	if !exists {
    93  		return fmt.Errorf("no instances of %+v found in %v namespace", identifier, namespace)
    94  	}
    95  	delete(namespaceState, identifier)
    96  	return nil
    97  }