github.com/1aal/kubeblocks@v0.0.0-20231107070852-e1c03e598921/cmd/reloader/template/safeclient.go (about)

     1  /*
     2  Copyright (C) 2022-2023 ApeCloud Co., Ltd
     3  
     4  This file is part of KubeBlocks project
     5  
     6  This program is free software: you can redistribute it and/or modify
     7  it under the terms of the GNU Affero General Public License as published by
     8  the Free Software Foundation, either version 3 of the License, or
     9  (at your option) any later version.
    10  
    11  This program is distributed in the hope that it will be useful
    12  but WITHOUT ANY WARRANTY; without even the implied warranty of
    13  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    14  GNU Affero General Public License for more details.
    15  
    16  You should have received a copy of the GNU Affero General Public License
    17  along with this program.  If not, see <http://www.gnu.org/licenses/>.
    18  */
    19  
    20  package main
    21  
    22  import (
    23  	"context"
    24  
    25  	apierrors "k8s.io/apimachinery/pkg/api/errors"
    26  	"sigs.k8s.io/controller-runtime/pkg/client"
    27  )
    28  
    29  // noneClient is a client.Client that does nothing.
    30  // It is used to prevent the template engine requests to the API server.
    31  // Avoid nil type client
    32  type noneClient struct {
    33  }
    34  
    35  func (n noneClient) Get(ctx context.Context, key client.ObjectKey, obj client.Object, opts ...client.GetOption) error {
    36  	return apierrors.NewServiceUnavailable("pod secondary not support client request.")
    37  }
    38  
    39  func (n noneClient) List(ctx context.Context, list client.ObjectList, opts ...client.ListOption) error {
    40  	return apierrors.NewServiceUnavailable("pod secondary not support client request.")
    41  }
    42  
    43  var nclient = &noneClient{}