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print_json.go
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print_json.go
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// Copyright (c) 2017 Cisco and/or its affiliates.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at:
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package utils
import (
"bytes"
"encoding/json"
"fmt"
"sort"
"strings"
"github.com/ligato/vpp-agent/plugins/defaultplugins/common/model/interfaces"
"github.com/ligato/vpp-agent/plugins/defaultplugins/common/model/l2"
"github.com/ligato/vpp-agent/plugins/defaultplugins/common/model/l3"
"github.com/logrusorgru/aurora.git"
)
const (
// IfConfig labels used by json formatter
IfConfig = "INTERFACE CONFIG"
// IfState labels used by json formatter
IfState = "INTERFACE STATE"
// BdConfig labels used by json formatter
BdConfig = "BRIDGE DOMAINS CONFIG"
// BdState labels used by json formatter
BdState = "BRIDGE DOMAINS State"
// L2FibConfig labels used by json formatter
L2FibConfig = "L2 FIB TABLE"
// L3FibConfig labels used by json formatter
L3FibConfig = "L3 FIB TABLE"
// Format
indent = " "
emptyJSON = "{}"
)
// PrintDataAsJSON prints etcd data in JSON format.
func (ed EtcdDump) PrintDataAsJSON(filter []string) (*bytes.Buffer, error) {
buffer := new(bytes.Buffer)
keys := ed.getSortedKeys()
var wasError error
vpps, isData := processFilter(keys, filter)
if !isData {
fmt.Fprintf(buffer, "No data to display for VPPS: %s\n", vpps)
return buffer, wasError
}
for _, key := range keys {
if isNotInFilter(key, vpps) {
continue
}
vd, _ := ed[key]
// Obtain raw data.
ifaceConfDataRoot, ifaceConfKeys := getInterfaceConfigData(vd.Interfaces)
ifaceStateDataRoot, ifaceStateKeys := getInterfaceStateData(vd.Interfaces)
l2ConfigDataRoot, l2Keys := getL2ConfigData(vd.BridgeDomains)
l2StateDataRoot, l2Keys := getL2StateData(vd.BridgeDomains)
l2FibDataRoot, l2FibKeys := getL2FIBData(vd.FibTableEntries)
l3FibDataRoot, l3FibKeys := getL3FIBData(vd.StaticRoutes)
// Interface config data
jsConfData, err := json.MarshalIndent(ifaceConfDataRoot, "", indent)
if err != nil {
wasError = err
}
// Interface state data
jsStateData, err := json.MarshalIndent(ifaceStateDataRoot, "", indent)
if err != nil {
wasError = err
}
// L2 config data
jsL2ConfigData, err := json.MarshalIndent(l2ConfigDataRoot, "", indent)
if err != nil {
wasError = err
}
// L2 state data
jsL2StateData, err := json.MarshalIndent(l2StateDataRoot, "", indent)
if err != nil {
wasError = err
}
// L2 FIB data
jsL2FIBData, err := json.MarshalIndent(l2FibDataRoot, "", indent)
if err != nil {
wasError = err
}
// L3 FIB data
jsL3FIBData, err := json.MarshalIndent(l3FibDataRoot, "", indent)
if err != nil {
wasError = err
}
// Add data to buffer.
if string(jsConfData) != emptyJSON {
printLabel(buffer, key+": - "+IfConfig+"\n", indent, ifaceConfKeys)
fmt.Fprintf(buffer, "%s\n", jsConfData)
}
if string(jsStateData) != emptyJSON {
printLabel(buffer, key+": - "+IfState+"\n", indent, ifaceStateKeys)
fmt.Fprintf(buffer, "%s\n", jsStateData)
}
if string(jsL2ConfigData) != emptyJSON {
printLabel(buffer, key+": - "+BdConfig+"\n", indent, l2Keys)
fmt.Fprintf(buffer, "%s\n", jsL2ConfigData)
}
if string(jsL2ConfigData) != emptyJSON {
printLabel(buffer, key+": - "+BdState+"\n", indent, l2Keys)
fmt.Fprintf(buffer, "%s\n", jsL2StateData)
}
if string(jsL2FIBData) != emptyJSON {
printLabel(buffer, key+": -"+L2FibConfig+"\n", indent, l2FibKeys)
fmt.Fprintf(buffer, "%s\n", jsL2FIBData)
}
if string(jsL3FIBData) != emptyJSON {
printLabel(buffer, key+": - "+L3FibConfig+"\n", indent, l3FibKeys)
fmt.Fprintf(buffer, "%s\n", jsL3FIBData)
}
}
return buffer, wasError
}
// 'processFilter' function returns a list of VPPs that satisfy the provided filter.
// If the filter is empty, all VPPs will be shown.
// If no data satisfy the filter, isData flag is returned as false.
func processFilter(keys []string, filter []string) ([]string, bool) {
var vpps []string
if len(filter) > 0 {
// Ignore all parameters but first.
vpps = strings.Split(filter[0], ",")
} else {
// Show all if there is no filter.
vpps = keys
}
var isData bool
// Find at least one match.
for _, key := range keys {
for _, vpp := range vpps {
if key == vpp {
isData = true
break
}
}
}
return vpps, isData
}
// Returns true if provided key is present in filter, false otherwise.
func isNotInFilter(key string, filter []string) bool {
for _, itemInFilter := range filter {
if itemInFilter == key {
return false
}
}
return true
}
// Get interface config data and create full interface config proto structure.
func getInterfaceConfigData(interfaceData map[string]InterfaceWithMD) (*interfaces.Interfaces, []string) {
// Config data
ifaceRoot := interfaces.Interfaces{}
ifaces := []*interfaces.Interfaces_Interface{}
var keyset []string
for _, ifaceData := range interfaceData {
if ifaceData.Config != nil {
iface := ifaceData.Config.Interface
ifaces = append(ifaces, iface)
keyset = append(keyset, ifaceData.Config.Metadata.Key)
}
}
sort.Strings(keyset)
ifaceRoot.Interfaces = ifaces
return &ifaceRoot, keyset
}
// Get interface state data and create full interface state proto structure.
func getInterfaceStateData(interfaceData map[string]InterfaceWithMD) (*interfaces.InterfacesState, []string) {
// Status data
ifaceStateRoot := interfaces.InterfacesState{}
ifaceStates := []*interfaces.InterfacesState_Interface{}
var keyset []string
for _, ifaceData := range interfaceData {
if ifaceData.State != nil {
ifaceState := ifaceData.State.InterfaceState
ifaceStates = append(ifaceStates, ifaceState)
keyset = append(keyset, ifaceData.State.Metadata.Key)
}
}
sort.Strings(keyset)
ifaceStateRoot.Interfaces = ifaceStates
return &ifaceStateRoot, keyset
}
// Get l2 config data and create full l2 bridge domains proto structure.
func getL2ConfigData(l2Data map[string]BdWithMD) (*l2.BridgeDomains, []string) {
l2Root := l2.BridgeDomains{}
l2s := []*l2.BridgeDomains_BridgeDomain{}
var keyset []string
for _, bdData := range l2Data {
if bdData.Config != nil {
bd := bdData.Config.BridgeDomain
l2s = append(l2s, bd)
keyset = append(keyset, bdData.Config.Metadata.Key)
}
}
sort.Strings(keyset)
l2Root.BridgeDomains = l2s
return &l2Root, keyset
}
// Get l2 state data and create full l2 bridge domains proto structure.
func getL2StateData(l2Data map[string]BdWithMD) (*l2.BridgeDomainState, []string) {
l2StateRoot := l2.BridgeDomainState{}
l2States := []*l2.BridgeDomainState_BridgeDomain{}
var keyset []string
for _, bdData := range l2Data {
if bdData.Config != nil && bdData.State != nil {
bd := bdData.State.BridgeDomainState
l2States = append(l2States, bd)
keyset = append(keyset, bdData.Config.Metadata.Key)
}
}
sort.Strings(keyset)
l2StateRoot.BridgeDomains = l2States
return &l2StateRoot, keyset
}
// Get L2 FIB data and create full L2 FIB proto structure.
func getL2FIBData(fibData FibTableWithMD) (*l2.FibTable, []string) {
fibRoot := l2.FibTable{}
fibRoot.FibTableEntries = fibData.FibTable
var keyset []string
for _, fib := range fibData.FibTable {
keyset = append(keyset, l2.FibKey(fib.BridgeDomain, fib.PhysAddress))
}
sort.Strings(keyset)
return &fibRoot, keyset
}
// Get L3 FIB data and create full L3 FIB proto structure.
func getL3FIBData(fibData StaticRoutesWithMD) (*l3.StaticRoutes, []string) {
fibRoot := l3.StaticRoutes{}
fibRoot.Routes = fibData.Routes
var keyset []string
for _, fib := range fibData.Routes {
keyset = append(keyset, l3.RouteKey(fib.VrfId, fib.DstIpAddr, fib.NextHopAddr))
}
sort.Strings(keyset)
return &fibRoot, keyset
}
// Print label before printing every data structure, including used keys.
func printLabel(buffer *bytes.Buffer, label string, prefix string, keyset []string) {
// Format output - find longest string in label to make label nicer
labelLength := len(label)
for _, key := range keyset {
if len(key) > labelLength {
labelLength = len(key)
}
}
ub := prefix + strings.Repeat("-", labelLength) + "\n"
// Print label.
fmt.Fprintf(buffer, ub)
fmt.Fprintf(buffer, "%s%s\n", prefix, aurora.Bold(label))
fmt.Fprintf(buffer, "%s%s\n", prefix, "Keys:")
for _, key := range keyset {
if key != "" {
fmt.Fprintf(buffer, "%s%s\n", prefix, key)
}
}
fmt.Fprintf(buffer, ub)
}