fix: should reset pluginState and other fields (#692)

Otherwise, the recorded exec time is incorrect after recycling.
Signed-off-by: spacewander <spacewanderlzx@gmail.com>

api/internal/consumer/mock.go

@@ -74,3 +74,14 @@ func (p *filterPlugin) Factory() api.FilterFactory {
 func (p *filterPlugin) Config() api.PluginConfig {
 	return &Config{}
 }
+
+type MockConsumer struct {
+}
+
+func (c *MockConsumer) Name() string {
+	return "mock"
+}
+
+func (c *MockConsumer) PluginConfig(_ string) api.PluginConsumerConfig {
+	return &ConsumerConfig{}
+}

api/pkg/filtermanager/api_impl.go

@@ -160,7 +160,10 @@ func (cb *filterManagerCallbackHandler) Reset() {
 	// We don't reset namespace, as filterManager will only be reused in the same route,
 	// which must have the same namespace.
 	cb.consumer = nil
+	cb.pluginState = nil
 	cb.streamInfo = nil
+	cb.logArgNames = ""
+	cb.logArgs = nil
 
 	cb.cacheLock.Unlock()
 }

api/pkg/filtermanager/api_impl_test.go

@@ -24,6 +24,7 @@ import (
 	"github.com/agiledragon/gomonkey/v2"
 	"github.com/stretchr/testify/assert"
 
+	"mosn.io/htnn/api/internal/consumer"
 	"mosn.io/htnn/api/pkg/filtermanager/api"
 	"mosn.io/htnn/api/pkg/filtermanager/model"
 	"mosn.io/htnn/api/plugins/tests/pkg/envoy"
@@ -233,3 +234,26 @@ func TestLogWithArgs(t *testing.T) {
 		assert.Equal(t, []any{0, 1, 2}, fmtArgs[level+"f"])
 	}
 }
+
+func TestReset(t *testing.T) {
+	cb := &filterManagerCallbackHandler{
+		FilterCallbackHandler: envoy.NewCAPIFilterCallbackHandler(),
+	}
+	cb.SetConsumer(&consumer.MockConsumer{})
+	cb.PluginState()
+	cb.StreamInfo()
+	cb.WithLogArg("k", "v")
+
+	assert.NotNil(t, cb.consumer)
+	assert.NotNil(t, cb.pluginState)
+	assert.NotNil(t, cb.streamInfo)
+	assert.NotEqual(t, "", cb.logArgNames)
+	assert.NotNil(t, cb.logArgs)
+
+	cb.Reset()
+	assert.Nil(t, cb.consumer)
+	assert.Nil(t, cb.pluginState)
+	assert.Nil(t, cb.streamInfo)
+	assert.Equal(t, "", cb.logArgNames)
+	assert.Nil(t, cb.logArgs)
+}