github.com/vmware/govmomi@v0.43.0/event/history_collector.go (about)

     1  /*
     2  Copyright (c) 2015 VMware, Inc. All Rights Reserved.
     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 event
    18  
    19  import (
    20  	"context"
    21  
    22  	"github.com/vmware/govmomi/history"
    23  	"github.com/vmware/govmomi/vim25"
    24  	"github.com/vmware/govmomi/vim25/methods"
    25  	"github.com/vmware/govmomi/vim25/mo"
    26  	"github.com/vmware/govmomi/vim25/types"
    27  )
    28  
    29  type HistoryCollector struct {
    30  	*history.Collector
    31  }
    32  
    33  func newHistoryCollector(c *vim25.Client, ref types.ManagedObjectReference) *HistoryCollector {
    34  	return &HistoryCollector{
    35  		Collector: history.NewCollector(c, ref),
    36  	}
    37  }
    38  
    39  func (h HistoryCollector) LatestPage(ctx context.Context) ([]types.BaseEvent, error) {
    40  	var o mo.EventHistoryCollector
    41  
    42  	err := h.Properties(ctx, h.Reference(), []string{"latestPage"}, &o)
    43  	if err != nil {
    44  		return nil, err
    45  	}
    46  
    47  	return o.LatestPage, nil
    48  }
    49  
    50  func (h HistoryCollector) ReadNextEvents(ctx context.Context, maxCount int32) ([]types.BaseEvent, error) {
    51  	req := types.ReadNextEvents{
    52  		This:     h.Reference(),
    53  		MaxCount: maxCount,
    54  	}
    55  
    56  	res, err := methods.ReadNextEvents(ctx, h.Client(), &req)
    57  	if err != nil {
    58  		return nil, err
    59  	}
    60  
    61  	return res.Returnval, nil
    62  }
    63  
    64  func (h HistoryCollector) ReadPreviousEvents(ctx context.Context, maxCount int32) ([]types.BaseEvent, error) {
    65  	req := types.ReadPreviousEvents{
    66  		This:     h.Reference(),
    67  		MaxCount: maxCount,
    68  	}
    69  
    70  	res, err := methods.ReadPreviousEvents(ctx, h.Client(), &req)
    71  	if err != nil {
    72  		return nil, err
    73  	}
    74  
    75  	return res.Returnval, nil
    76  }