searcher pool is ready

binding/golang/service/searcher_pool.go

@@ -11,9 +11,9 @@
 package service
 
 import (
-	"context"
 	"fmt"
 	"sync/atomic"
+	"time"
 
 	"github.com/lionsoul2014/ip2region/binding/golang/xdb"
 )
@@ -61,18 +61,19 @@ func NewSearcherPool(config *Config) (*SearcherPool, error) {
 // Stat return the stat {loanCount, leftCount} info of the pool
 func (sp *SearcherPool) Stat() (int, int) {
 	loanCount := int(atomic.LoadInt32(&sp.loanCount))
-	return loanCount, len(sp.pool) - loanCount
+	return loanCount, len(sp.pool)
+}
+
+// get the loaned count
+func (sp *SearcherPool) LoanCount() int {
+	return int(atomic.LoadInt32(&sp.loanCount))
 }
 
 func (sp *SearcherPool) BorrowSearcher() *xdb.Searcher {
-	select {
-	case <-sp.closing:
-		// stop searcher borrow while closing
-		return nil
-	case s := <-sp.pool:
-		atomic.AddInt32(&sp.loanCount, 1)
-		return s
-	}
+	// @Note: still accept searcher borrow while closing
+	s := <-sp.pool
+	atomic.AddInt32(&sp.loanCount, 1)
+	return s
 }
 
 func (sp *SearcherPool) ReturnSearcher(searcher *xdb.Searcher) {
@@ -80,6 +81,9 @@ func (sp *SearcherPool) ReturnSearcher(searcher *xdb.Searcher) {
 	case <-sp.closing:
 		// manually close the searcher
 		searcher.Close()
+
+		// decrease the loan count
+		atomic.AddInt32(&sp.loanCount, -1)
 	default:
 		// return the searcher
 		sp.pool <- searcher
@@ -87,9 +91,29 @@ func (sp *SearcherPool) ReturnSearcher(searcher *xdb.Searcher) {
 	}
 }
 
-func (sp *SearcherPool) Close(ctx context.Context) {
+func (sp *SearcherPool) Close() {
+	sp.CloseTimeout(time.Second * 10)
+}
+
+func (sp *SearcherPool) CloseTimeout(d time.Duration) {
 	close(sp.closing)
-	for s := range sp.pool {
-		s.Close()
+	for {
+		timeout := false
+		select {
+		case s := <-sp.pool:
+			s.Close()
+		case <-time.After(d):
+			// check if all the loaned searchers was closed
+			timeout = true
+		}
+
+		lc, left := sp.LoanCount(), len(sp.pool)
+		if left == 0 && lc == 0 {
+			break
+		}
+
+		if timeout {
+			break
+		}
 	}
 }

binding/golang/service/searcher_pool_test.go

@@ -0,0 +1,70 @@
+// Copyright 2022 The Ip2Region Authors. All rights reserved.
+// Use of this source code is governed by a Apache2.0-style
+// license that can be found in the LICENSE file.
+
+package service
+
+import (
+	"fmt"
+	"testing"
+)
+
+func TestV4SearcherPool(t *testing.T) {
+	v4Config, err := NewV4Config(VIndexCache, "../../../data/ip2region_v4.xdb", 5)
+	if err != nil {
+		t.Fatalf("failed to new v4 config: %s", err)
+	}
+
+	searcherPool, err := NewSearcherPool(v4Config)
+	if err != nil {
+		t.Fatalf("failed to create searcher pool: %s", err)
+	}
+
+	ipString := "219.133.110.197"
+	for i := 0; i < 20; i++ {
+		searcher := searcherPool.BorrowSearcher()
+		region, err := searcher.SearchByStr(ipString)
+		if err != nil {
+			t.Fatalf("failed to search(%s): %s", ipString, err)
+		}
+
+		fmt.Printf("%2d->search(%s)=%s\n", i, ipString, region)
+		searcherPool.ReturnSearcher(searcher)
+	}
+
+	// borrow one at last for Close timeout wait testing ONLY
+	// searcherPool.BorrowSearcher()
+
+	// close the searcher pool
+	searcherPool.Close()
+}
+
+func TestV6SearcherPool(t *testing.T) {
+	v6Config, err := NewV6Config(VIndexCache, "../../../data/ip2region_v6.xdb", 5)
+	if err != nil {
+		t.Fatalf("failed to new v6 config: %s", err)
+	}
+
+	searcherPool, err := NewSearcherPool(v6Config)
+	if err != nil {
+		t.Fatalf("failed to create searcher pool: %s", err)
+	}
+
+	ipString := "240e:3b7:3275:f090:d2a3:7d1a:dd90:c3b6"
+	for i := 0; i < 20; i++ {
+		searcher := searcherPool.BorrowSearcher()
+		region, err := searcher.SearchByStr(ipString)
+		if err != nil {
+			t.Fatalf("failed to search(%s): %s", ipString, err)
+		}
+
+		fmt.Printf("%2d->search(%s)=%s\n", i, ipString, region)
+		searcherPool.ReturnSearcher(searcher)
+	}
+
+	// borrow one at last for Close timeout wait testing ONLY
+	// searcherPool.BorrowSearcher()
+
+	// close the searcher pool
+	searcherPool.Close()
+}