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metacache_test.go
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metacache_test.go
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// Copyright (C) 2015 The GoHBase Authors. All rights reserved.
// This file is part of GoHBase.
// Use of this source code is governed by the Apache License 2.0
// that can be found in the COPYING file.
package gohbase
import (
"bytes"
"fmt"
"reflect"
"sort"
"strconv"
"testing"
"github.com/tsuna/gohbase/hrpc"
"github.com/tsuna/gohbase/region"
mockRegion "github.com/tsuna/gohbase/test/mock/region"
"go.uber.org/mock/gomock"
)
func TestMetaCache(t *testing.T) {
client := newClient("~invalid.quorum~") // We shouldn't connect to ZK.
reg := client.getRegionFromCache([]byte("test"), []byte("theKey"))
if reg != nil {
t.Errorf("Found region %v even though the cache was empty?!", reg)
}
// Inject an entry in the cache. This entry covers the entire key range.
wholeTable := region.NewInfo(
0,
nil,
[]byte("test"),
[]byte("test,,1234567890042.56f833d5569a27c7a43fbf547b4924a4."),
nil,
nil,
)
ctrl := gomock.NewController(t)
defer ctrl.Finish()
regClient := mockRegion.NewMockRegionClient(ctrl)
regClient.EXPECT().Addr().Return("regionserver:1").AnyTimes()
regClient.EXPECT().String().Return("mock region client").AnyTimes()
newClientFn := func() hrpc.RegionClient {
return regClient
}
client.regions.put(wholeTable)
client.clients.put("regionserver:1", wholeTable, newClientFn)
reg = client.getRegionFromCache([]byte("test"), []byte("theKey"))
if !reflect.DeepEqual(reg, wholeTable) {
t.Errorf("Found region %v but expected %v", reg, wholeTable)
}
reg = client.getRegionFromCache([]byte("test"), []byte("")) // edge case.
if !reflect.DeepEqual(reg, wholeTable) {
t.Errorf("Found region %v but expected %v", reg, wholeTable)
}
// Clear our client.
client = newClient("~invalid.quorum~")
// Inject 3 entries in the cache.
region1 := region.NewInfo(
0,
nil,
[]byte("test"),
[]byte("test,,1234567890042.56f833d5569a27c7a43fbf547b4924a4."),
[]byte(""),
[]byte("foo"),
)
if os, replaced := client.regions.put(region1); !replaced {
t.Errorf("Expected to put new region into cache, got: %v", os)
} else if len(os) != 0 {
t.Errorf("Didn't expect any overlaps, got: %v", os)
}
client.clients.put("regionserver:1", region1, newClientFn)
region2 := region.NewInfo(
0,
nil,
[]byte("test"),
[]byte("test,foo,1234567890042.56f833d5569a27c7a43fbf547b4924a4."),
[]byte("foo"),
[]byte("gohbase"),
)
if os, replaced := client.regions.put(region2); !replaced {
t.Errorf("Expected to put new region into cache, got: %v", os)
} else if len(os) != 0 {
t.Errorf("Didn't expect any overlaps, got: %v", os)
}
client.clients.put("regionserver:1", region2, newClientFn)
region3 := region.NewInfo(
0,
nil,
[]byte("test"),
[]byte("test,gohbase,1234567890042.56f833d5569a27c7a43fbf547b4924a4."),
[]byte("gohbase"),
[]byte(""),
)
if os, replaced := client.regions.put(region3); !replaced {
t.Errorf("Expected to put new region into cache, got: %v", os)
} else if len(os) != 0 {
t.Errorf("Didn't expect any overlaps, got: %v", os)
}
client.clients.put("regionserver:1", region3, newClientFn)
testcases := []struct {
key string
reg hrpc.RegionInfo
}{
{key: "theKey", reg: region3},
{key: "", reg: region1},
{key: "bar", reg: region1},
{key: "fon\xFF", reg: region1},
{key: "foo", reg: region2},
{key: "foo\x00", reg: region2},
{key: "gohbase", reg: region3},
}
for i, testcase := range testcases {
reg = client.getRegionFromCache([]byte("test"), []byte(testcase.key))
if !reflect.DeepEqual(reg, testcase.reg) {
t.Errorf("[#%d] Found region %v but expected %v", i, reg, testcase.reg)
}
}
// Change the last region (maybe it got split).
region4 := region.NewInfo(
0,
nil,
[]byte("test"),
[]byte("test,gohbase,1234567890042.swagswagswagswagswagswagswagswag."),
[]byte("gohbase"),
[]byte("zab"),
)
if os, replaced := client.regions.put(region4); !replaced {
t.Errorf("Expected to put new region into cache, got: %v", os)
} else if len(os) != 1 || os[0] != region3 {
t.Errorf("Expected one overlap, got: %v", os)
}
client.clients.put("regionserver:1", region4, newClientFn)
reg = client.getRegionFromCache([]byte("test"), []byte("theKey"))
if !reflect.DeepEqual(reg, region4) {
t.Errorf("Found region %v but expected %v", reg, region4)
}
reg = client.getRegionFromCache([]byte("test"), []byte("zoo"))
if reg != nil {
t.Errorf("Shouldn't have found any region yet found %v", reg)
}
// attempt putting a region with same name
region5 := region.NewInfo(
0,
nil,
[]byte("test"),
[]byte("test,gohbase,1234567890042.swagswagswagswagswagswagswagswag."),
nil,
[]byte("zab"),
)
if os, replaced := client.regions.put(region5); replaced {
t.Errorf("Expected to not replace a region in cache, got: %v", os)
} else if len(os) != 1 || os[0] != region4 {
t.Errorf("Expected overlaps, got: %v", os)
}
}
func TestMetaCacheGet(t *testing.T) {
tcases := []struct {
in []hrpc.RegionInfo
table []byte
key []byte
outIndexFromIn int
}{
{
table: []byte("yolo"),
key: []byte("swag"),
outIndexFromIn: -1,
},
{ // the whole table
in: []hrpc.RegionInfo{
region.NewInfo(0, nil, []byte("test"),
[]byte("test,,1234567890042.swagswagswagswagswagswagswagswag."),
nil, nil),
},
table: []byte("test"),
key: []byte("swag"),
outIndexFromIn: 0,
},
{ // one region in cache, different table
in: []hrpc.RegionInfo{
region.NewInfo(0, nil, []byte("test"),
[]byte("test,,1234567890042.swagswagswagswagswagswagswagswag."),
nil, nil),
},
table: []byte("yolo"),
key: []byte("swag"),
outIndexFromIn: -1,
},
{ // key is before the first region in cache
in: []hrpc.RegionInfo{
region.NewInfo(0, nil, []byte("test"),
[]byte("test,foo,1234567890042.swagswagswagswagswagswagswagswag."),
[]byte("foo"), nil),
},
table: []byte("test"),
key: []byte("bar"),
outIndexFromIn: -1,
},
{ // key is between two regions in cache
in: []hrpc.RegionInfo{
region.NewInfo(0, nil, []byte("meow"),
[]byte("meow,bar,1234567890042.swagswagswagswagswagswagswagswag."),
[]byte("bar"), []byte("foo")),
region.NewInfo(0, nil, []byte("test"),
[]byte("test,foo,1234567890042.swagswagswagswagswagswagswagswag."),
[]byte("foo"), nil),
},
table: []byte("meow"),
key: []byte("swag"),
outIndexFromIn: -1,
},
{ // test with namespace region in cache
in: []hrpc.RegionInfo{
region.NewInfo(0, []byte("n1"), []byte("test"),
[]byte("n1:test,,1234567890042.swagswagswagswagswagswagswagswag."),
nil, nil),
},
table: []byte("test"),
key: []byte("swag"),
outIndexFromIn: -1,
},
{ // test with namespace region in cache
in: []hrpc.RegionInfo{
region.NewInfo(0, []byte("n1"), []byte("test"),
[]byte("n1:test,,1234567890042.swagswagswagswagswagswagswagswag."),
nil, nil),
},
table: []byte("n1:test"),
key: []byte("swag"),
outIndexFromIn: 0,
},
{ // test with default namespace in cache, but non-default key
in: []hrpc.RegionInfo{
region.NewInfo(0, nil, []byte("test"),
[]byte("test,,1234567890042.swagswagswagswagswagswagswagswag."),
nil, nil),
},
table: []byte("n1:test"),
key: []byte("swag"),
outIndexFromIn: -1,
},
{ // test with non-default namespace region in cache, but default key
in: []hrpc.RegionInfo{
region.NewInfo(0, []byte("n1"), []byte("test"),
[]byte("n1:test,,1234567890042.swagswagswagswagswagswagswagswag."),
nil, nil),
},
table: []byte("test"),
key: []byte("swag"),
outIndexFromIn: -1,
},
{ // test 3 regions
in: []hrpc.RegionInfo{
region.NewInfo(0, nil, []byte("test"),
[]byte("test,,1234567890042.swagswagswagswagswagswagswagswag."),
nil, []byte("bar")),
region.NewInfo(0, nil, []byte("test"),
[]byte("test,bar,1234567890042.swagswagswagswagswagswagswagswag."),
[]byte("bar"), []byte("foo")),
region.NewInfo(0, nil, []byte("test"),
[]byte("test,foo,1234567890042.swagswagswagswagswagswagswagswag."),
[]byte("foo"), []byte("yolo")),
},
table: []byte("test"),
key: []byte("baz"),
outIndexFromIn: 1,
},
}
for i, tcase := range tcases {
t.Run(fmt.Sprintf("Test %d", i), func(t *testing.T) {
client := newClient("~invalid.quorum~") // We shouldn't connect to ZK.
for _, r := range tcase.in {
overlaps, replaced := client.regions.put(r)
if len(overlaps) != 0 {
t.Fatalf("Didn't expect any overlaps, got %q", overlaps)
}
if !replaced {
t.Fatal("Didn't expect to replace anything in cache")
}
}
// lookup region in cache
region := client.getRegionFromCache(tcase.table, tcase.key)
if tcase.outIndexFromIn == -1 && region != nil {
t.Fatalf("expected to get nil region, got %v", region)
} else {
return
}
if len(tcase.in) == 0 && region != nil {
t.Fatalf("didn't expect to get anything from empty cache, got %v", region)
}
if tcase.in[tcase.outIndexFromIn].String() != region.String() {
t.Errorf("Expected %v, Got %v",
tcase.in[tcase.outIndexFromIn].String(), region.String())
}
})
}
}
func TestRegionCacheAge(t *testing.T) {
tcases := []struct {
cachedRegions []hrpc.RegionInfo
newRegion hrpc.RegionInfo
replaced bool
}{
{ // all older
cachedRegions: []hrpc.RegionInfo{
region.NewInfo(
1, nil, []byte("hello"),
[]byte("hello,,1.yoloyoloyoloyoloyoloyoloyoloyolo."),
[]byte(""), []byte("foo"),
),
region.NewInfo(
1, nil, []byte("hello"),
[]byte("hello,foo,1.swagswagswagswagswagswagswagswag."),
[]byte("foo"), []byte(""),
)},
newRegion: region.NewInfo(
2, nil, []byte("hello"),
[]byte("hello,,2.meowmemowmeowmemowmeowmemowmeow."),
[]byte(""), []byte(""),
),
replaced: true,
},
{ // all younger
cachedRegions: []hrpc.RegionInfo{
region.NewInfo(
2, nil, []byte("hello"),
[]byte("hello,,2.yoloyoloyoloyoloyoloyoloyoloyolo."),
[]byte(""), []byte("foo"),
),
region.NewInfo(
2, nil, []byte("hello"),
[]byte("hello,foo,2.swagswagswagswagswagswagswagswag."),
[]byte("foo"), []byte(""),
)},
newRegion: region.NewInfo(
1, nil, []byte("hello"),
[]byte("hello,,1.meowmemowmeowmemowmeowmemowmeow."),
[]byte(""), []byte(""),
),
replaced: false,
},
{ // one younger, one older
cachedRegions: []hrpc.RegionInfo{
region.NewInfo(
1, nil, []byte("hello"),
[]byte("hello,,1.yoloyoloyoloyoloyoloyoloyoloyolo."),
[]byte(""), []byte("foo"),
),
region.NewInfo(
3, nil, []byte("hello"),
[]byte("hello,foo,3.swagswagswagswagswagswagswagswag."),
[]byte("foo"), []byte(""),
)},
newRegion: region.NewInfo(
2, nil, []byte("hello"),
[]byte("hello,,1.meowmemowmeowmemowmeowmemowmeow."),
[]byte(""), []byte(""),
),
replaced: false,
},
}
client := newClient("~invalid.quorum~")
for i, tcase := range tcases {
t.Run(strconv.Itoa(i), func(t *testing.T) {
client.regions.regions.Clear()
// set up initial cache
for _, region := range tcase.cachedRegions {
client.regions.put(region)
}
overlaps, replaced := client.regions.put(tcase.newRegion)
if replaced != tcase.replaced {
t.Errorf("expected %v, got %v", tcase.replaced, replaced)
}
expectedNames := make(regionNames, len(tcase.cachedRegions))
for i, r := range tcase.cachedRegions {
expectedNames[i] = r.Name()
}
osNames := make(regionNames, len(overlaps))
for i, o := range overlaps {
osNames[i] = o.Name()
}
// check overlaps are correct
if !reflect.DeepEqual(expectedNames, osNames) {
t.Errorf("expected %v, got %v", expectedNames, osNames)
}
})
}
}
type regionNames [][]byte
func (a regionNames) Len() int { return len(a) }
func (a regionNames) Less(i, j int) bool { return bytes.Compare(a[i], a[j]) < 0 }
func (a regionNames) Swap(i, j int) { a[i], a[j] = a[j], a[i] }
func TestMetaCacheGetOverlaps(t *testing.T) {
region1 := region.NewInfo(
0,
nil,
[]byte("test"),
[]byte("test,,1234567890042.56f833d5569a27c7a43fbf547b4924a4."),
[]byte(""),
[]byte("foo"),
)
regionA := region.NewInfo(
0,
nil,
[]byte("hello"),
[]byte("hello,,1234567890042.56f833d5569a27c7a43fbf547b4924a4."),
[]byte(""),
[]byte("foo"),
)
regionB := region.NewInfo(
0,
nil,
[]byte("hello"),
[]byte("hello,foo,987654321042.56f833d5569a27c7a43fbf547b4924a4."),
[]byte("foo"),
[]byte("fox"),
)
regionC := region.NewInfo(
0,
nil,
[]byte("hello"),
[]byte("hello,fox,987654321042.56f833d5569a27c7a43fbf547b4924a4."),
[]byte("fox"),
[]byte("yolo"),
)
regionWhole := region.NewInfo(
0,
nil,
[]byte("hello"),
[]byte("hello,,1234567890042.56f833d5569a27c7a43fbf547b4924a4."),
nil,
nil,
)
regionTests := []struct {
cachedRegions []hrpc.RegionInfo
newRegion hrpc.RegionInfo
expected []hrpc.RegionInfo
}{
{[]hrpc.RegionInfo{}, region1, []hrpc.RegionInfo{}}, // empty cache
{[]hrpc.RegionInfo{region1}, region1, []hrpc.RegionInfo{region1}}, // with itself
{ // different table
[]hrpc.RegionInfo{region1},
region.NewInfo(
0,
nil,
[]byte("hello"),
[]byte("hello,,1234567890042.56f833d5569a27c7a43fbf547b4924a4."),
[]byte(""),
[]byte("fake"),
),
[]hrpc.RegionInfo{},
},
{ // different namespace
[]hrpc.RegionInfo{
region.NewInfo(
0,
[]byte("ns1"),
[]byte("test"),
[]byte("ns1:test,,1234567890042.56f833d5569a27c7a43fbf547b4924a4."),
[]byte(""),
[]byte("foo"),
),
},
region.NewInfo(
0,
nil,
[]byte("test"),
[]byte("test,,1234567890042.56f833d5569a27c7a43fbf547b4924a4."),
[]byte(""),
[]byte("foo"),
),
[]hrpc.RegionInfo{},
},
{ // overlaps with both
[]hrpc.RegionInfo{regionA, regionB},
region.NewInfo(
0,
nil,
[]byte("hello"),
[]byte("hello,bar,1234567890042.56f833d5569a27c7a43fbf547b4924a4."),
[]byte("bar"),
[]byte("fop"),
),
[]hrpc.RegionInfo{regionA, regionB},
},
{ // overlaps with both, key start == old one
[]hrpc.RegionInfo{regionA, regionB},
region.NewInfo(
0,
nil,
[]byte("hello"),
[]byte("hello,,1234567890042.56f833d5569a27c7a43fbf547b4924a4."),
[]byte(""),
[]byte("yolo"),
),
[]hrpc.RegionInfo{regionA, regionB},
},
{ // overlaps with second
[]hrpc.RegionInfo{regionA, regionB},
region.NewInfo(
0,
nil,
[]byte("hello"),
[]byte("hello,fop,1234567890042.56f833d5569a27c7a43fbf547b4924a4."),
[]byte("fop"),
[]byte("yolo"),
),
[]hrpc.RegionInfo{regionB},
},
{ // overlaps with first, new key start == old one
[]hrpc.RegionInfo{regionA, regionB},
region.NewInfo(
0,
nil,
[]byte("hello"),
[]byte("hello,,1234567890042.56f833d5569a27c7a43fbf547b4924a4."),
[]byte(""),
[]byte("abc"),
),
[]hrpc.RegionInfo{regionA},
},
{ // doesn't overlap, is between existing
[]hrpc.RegionInfo{regionA, regionC},
regionB,
[]hrpc.RegionInfo{},
},
{ // without bounds in cache, replaced by region with both bounds
[]hrpc.RegionInfo{regionWhole},
regionB,
[]hrpc.RegionInfo{regionWhole},
},
{ // without bounds in cache, replaced by the empty stop key only
[]hrpc.RegionInfo{regionWhole},
region.NewInfo(
0,
nil,
[]byte("hello"),
[]byte("hello,,1234567890042.56f833d5569a27c7a43fbf547b4924a4."),
[]byte("yolo"),
nil,
),
[]hrpc.RegionInfo{regionWhole},
},
{ // without bounds in cache, replaced by the empty start key only
[]hrpc.RegionInfo{regionWhole},
region.NewInfo(
0,
nil,
[]byte("hello"),
[]byte("hello,,1234567890042.56f833d5569a27c7a43fbf547b4924a4."),
nil,
[]byte("yolo"),
),
[]hrpc.RegionInfo{regionWhole},
},
{ // regions with bounds in cache, replaced by without bounds
[]hrpc.RegionInfo{regionB, regionC},
regionWhole,
[]hrpc.RegionInfo{regionB, regionC},
},
{ // without bounds in cache, replaced by without bounds
[]hrpc.RegionInfo{regionWhole},
region.NewInfo(
0,
nil,
[]byte("hello"),
[]byte("hello,,1234567890042.yoloyoloyoloyoloyoloyoloyoloyolo."),
nil,
nil,
),
[]hrpc.RegionInfo{regionWhole},
},
}
for i, tt := range regionTests {
t.Run(fmt.Sprintf("Test %d", i), func(t *testing.T) {
client := newClient("~invalid.quorum~") // fake client
// set up initial cache
for _, region := range tt.cachedRegions {
client.regions.regions.Set(region.Name(), region)
}
expectedNames := make(regionNames, len(tt.expected))
for i, r := range tt.expected {
expectedNames[i] = r.Name()
}
os := client.regions.getOverlaps(tt.newRegion)
osNames := make(regionNames, len(os))
for i, o := range os {
osNames[i] = o.Name()
}
sort.Sort(expectedNames)
sort.Sort(osNames)
if !reflect.DeepEqual(expectedNames, osNames) {
t.Errorf("Expected overlaps %q, found %q", expectedNames, osNames)
}
})
}
}
func TestClientCachePut(t *testing.T) {
client := newClient("~invalid.quorum~")
ctrl := gomock.NewController(t)
defer ctrl.Finish()
var newClientCalled bool
regClient := client.clients.put("regionserver:1", region.NewInfo(0, nil, []byte("test"),
[]byte("test,,1234567890042.yoloyoloyoloyoloyoloyoloyoloyolo."), nil, nil),
func() hrpc.RegionClient {
newClientCalled = true
regClient := mockRegion.NewMockRegionClient(ctrl)
regClient.EXPECT().Addr().Return("regionserver:1").AnyTimes()
regClient.EXPECT().String().Return("mock region client").AnyTimes()
return regClient
})
if !newClientCalled {
t.Fatal("expected newClient to be called")
}
if len(client.clients.regions) != 1 {
t.Errorf("Expected 1 client in cache, got %d", len(client.clients.regions))
}
if len(client.clients.regions[regClient]) != 1 {
t.Errorf("Expected 1 region for client in cache, got %d",
len(client.clients.regions[regClient]))
}
// but put a different region for the same address
regClient2 := client.clients.put("regionserver:1", region.NewInfo(0, nil, []byte("yolo"),
[]byte("yolo,,1234567890042.yoloyoloyoloyoloyoloyoloyoloyolo."), nil, nil),
func() hrpc.RegionClient {
t.Fatal("newClient should not be called")
return nil
})
if regClient2 != regClient {
t.Fatalf("expected to get the same exact region client: %s vs %s", regClient2, regClient)
}
// nothing should have changed in clients cache
if len(client.clients.regions) != 1 {
t.Errorf("Expected 1 client in cache, got %d", len(client.clients.regions))
}
if len(client.clients.regions[regClient]) != 2 {
t.Errorf("Expected 2 regions for client in cache, got %d",
len(client.clients.regions[regClient]))
}
}