Fix panic when specifying a nil session ID (#232)

Propagate the session ID selected by the broker when a nil session ID is
specified.  This requires an updated go-amqp to work.
Removed validation of EnqueuedSequenceNumber as it's not guaranteed to
be returned.

go.mod

@@ -5,7 +5,7 @@ go 1.12
 require (
 	github.com/Azure/azure-amqp-common-go/v3 v3.1.0
 	github.com/Azure/azure-sdk-for-go v51.1.0+incompatible
-	github.com/Azure/go-amqp v0.13.7
+	github.com/Azure/go-amqp v0.13.8
 	github.com/Azure/go-autorest/autorest v0.11.18
 	github.com/Azure/go-autorest/autorest/adal v0.9.13
 	github.com/Azure/go-autorest/autorest/date v0.3.0

go.sum

@@ -3,11 +3,10 @@ github.com/Azure/azure-amqp-common-go/v3 v3.1.0/go.mod h1:PBIGdzcO1teYoufTKMcGib
 github.com/Azure/azure-sdk-for-go v51.1.0+incompatible h1:7uk6GWtUqKg6weLv2dbKnzwb0ml1Qn70AdtRccZ543w=
 github.com/Azure/azure-sdk-for-go v51.1.0+incompatible/go.mod h1:9XXNKU+eRnpl9moKnB4QOLf1HestfXbmab5FXxiDBjc=
 github.com/Azure/go-amqp v0.13.0/go.mod h1:qj+o8xPCz9tMSbQ83Vp8boHahuRDl5mkNHyt1xlxUTs=
-github.com/Azure/go-amqp v0.13.7 h1:ukcCtx138ZmOfHbdALuh9yoJhGtOY3+yaKApfzNvhSk=
-github.com/Azure/go-amqp v0.13.7/go.mod h1:wbpCKA8tR5MLgRyIu+bb+S6ECdIDdYJ0NlpFE9xsBPI=
+github.com/Azure/go-amqp v0.13.8 h1:EGDxD/Iyzs65DX0h5Tc8k9czVBjJ4lmZ16E8aQD/d7Y=
+github.com/Azure/go-amqp v0.13.8/go.mod h1:wbpCKA8tR5MLgRyIu+bb+S6ECdIDdYJ0NlpFE9xsBPI=
 github.com/Azure/go-autorest v14.2.0+incompatible h1:V5VMDjClD3GiElqLWO7mz2MxNAK/vTfRHdAubSIPRgs=
 github.com/Azure/go-autorest v14.2.0+incompatible/go.mod h1:r+4oMnoxhatjLLJ6zxSWATqVooLgysK6ZNox3g/xq24=
-github.com/Azure/go-autorest/autorest v0.11.3 h1:fyYnmYujkIXUgv88D9/Wo2ybE4Zwd/TmQd5sSI5u2Ws=
 github.com/Azure/go-autorest/autorest v0.11.3/go.mod h1:JFgpikqFJ/MleTTxwepExTKnFUKKszPS8UavbQYUMuw=
 github.com/Azure/go-autorest/autorest v0.11.18 h1:90Y4srNYrwOtAgVo3ndrQkTYn6kf1Eg/AjTFJ8Is2aM=
 github.com/Azure/go-autorest/autorest v0.11.18/go.mod h1:dSiJPy22c3u0OtOKDNttNgqpNFY/GeWa7GH/Pz56QRA=
@@ -16,15 +15,13 @@ github.com/Azure/go-autorest/autorest/adal v0.9.13 h1:Mp5hbtOePIzM8pJVRa3YLrWWmZ
 github.com/Azure/go-autorest/autorest/adal v0.9.13/go.mod h1:W/MM4U6nLxnIskrw4UwWzlHfGjwUS50aOsc/I3yuU8M=
 github.com/Azure/go-autorest/autorest/date v0.3.0 h1:7gUk1U5M/CQbp9WoqinNzJar+8KY+LPI6wiWrP/myHw=
 github.com/Azure/go-autorest/autorest/date v0.3.0/go.mod h1:BI0uouVdmngYNUzGWeSYnokU+TrmwEsOqdt8Y6sso74=
-github.com/Azure/go-autorest/autorest/mocks v0.4.0 h1:z20OWOSG5aCye0HEkDp6TPmP17ZcfeMxPi6HnSALa8c=
 github.com/Azure/go-autorest/autorest/mocks v0.4.0/go.mod h1:LTp+uSrOhSkaKrUy935gNZuuIPPVsHlr9DSOxSayd+k=
 github.com/Azure/go-autorest/autorest/mocks v0.4.1 h1:K0laFcLE6VLTOwNgSxaGbUcLPuGXlNkbVvq4cW4nIHk=
 github.com/Azure/go-autorest/autorest/mocks v0.4.1/go.mod h1:LTp+uSrOhSkaKrUy935gNZuuIPPVsHlr9DSOxSayd+k=
 github.com/Azure/go-autorest/autorest/to v0.4.0 h1:oXVqrxakqqV1UZdSazDOPOLvOIz+XA683u8EctwboHk=
 github.com/Azure/go-autorest/autorest/to v0.4.0/go.mod h1:fE8iZBn7LQR7zH/9XU2NcPR4o9jEImooCeWJcYV/zLE=
 github.com/Azure/go-autorest/autorest/validation v0.3.1 h1:AgyqjAd94fwNAoTjl/WQXg4VvFeRFpO+UhNyRXqF1ac=
 github.com/Azure/go-autorest/autorest/validation v0.3.1/go.mod h1:yhLgjC0Wda5DYXl6JAsWyUe4KVNffhoDhG0zVzUMo3E=
-github.com/Azure/go-autorest/logger v0.2.0 h1:e4RVHVZKC5p6UANLJHkM4OfR1UKZPj8Wt8Pcx+3oqrE=
 github.com/Azure/go-autorest/logger v0.2.0/go.mod h1:T9E3cAhj2VqvPOtCYAvby9aBXkZmbF5NWuPV8+WeEW8=
 github.com/Azure/go-autorest/logger v0.2.1 h1:IG7i4p/mDa2Ce4TRyAO8IHnVhAVF3RFU+ZtXWSmf4Tg=
 github.com/Azure/go-autorest/logger v0.2.1/go.mod h1:T9E3cAhj2VqvPOtCYAvby9aBXkZmbF5NWuPV8+WeEW8=
@@ -35,7 +32,6 @@ github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/devigned/tab v0.1.1 h1:3mD6Kb1mUOYeLpJvTVSDwSg5ZsfSxfvxGRTxRsJsITA=
 github.com/devigned/tab v0.1.1/go.mod h1:XG9mPq0dFghrYvoBF3xdRrJzSTX1b7IQrvaL9mzjeJY=
-github.com/dgrijalva/jwt-go v3.2.0+incompatible h1:7qlOGliEKZXTDg6OTjfoBKDXWrumCAMpl/TFQ4/5kLM=
 github.com/dgrijalva/jwt-go v3.2.0+incompatible/go.mod h1:E3ru+11k8xSBh+hMPgOLZmtrrCbhqsmaPHjLKYnJCaQ=
 github.com/form3tech-oss/jwt-go v3.2.2+incompatible h1:TcekIExNqud5crz4xD2pavyTgWiPvpYe4Xau31I0PRk=
 github.com/form3tech-oss/jwt-go v3.2.2+incompatible/go.mod h1:pbq4aXjuKjdthFRnoDwaVPLA+WlJuPGy+QneDUgJi2k=
@@ -100,7 +96,6 @@ github.com/ugorji/go/codec v1.1.7 h1:2SvQaVZ1ouYrrKKwoSk2pzd4A9evlKJb9oTL+OaLUSs
 github.com/ugorji/go/codec v1.1.7/go.mod h1:Ax+UKWsSmolVDwsd+7N3ZtXu+yMGCf907BLYF3GoBXY=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
 golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
-golang.org/x/crypto v0.0.0-20200728195943-123391ffb6de h1:ikNHVSjEfnvz6sxdSPCaPt572qowuyMDMJLLm3Db3ig=
 golang.org/x/crypto v0.0.0-20200728195943-123391ffb6de/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
 golang.org/x/crypto v0.0.0-20201002170205-7f63de1d35b0 h1:hb9wdF1z5waM+dSIICn1l0DkLVDT3hqhhQsDNUmHPRE=
 golang.org/x/crypto v0.0.0-20201002170205-7f63de1d35b0/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=

queue_test.go

@@ -508,7 +508,6 @@ func testMessageProperties(ctx context.Context, t *testing.T, q *Queue) {
 			HandlerFunc(func(ctx context.Context, msg *Message) error {
 				sp := msg.SystemProperties
 				assert.NotNil(t, sp.LockedUntil, "LockedUntil")
-				assert.NotNil(t, sp.EnqueuedSequenceNumber, "EnqueuedSequenceNumber")
 				assert.NotNil(t, sp.EnqueuedTime, "EnqueuedTime")
 				assert.NotNil(t, sp.SequenceNumber, "SequenceNumber")
 				assert.NotNil(t, sp.PartitionID, "PartitionID")

receiver.go

@@ -24,6 +24,8 @@ package servicebus
 
 import (
 	"context"
+	"errors"
+	"fmt"
 	"sync"
 	"time"
 
@@ -33,6 +35,8 @@ import (
 	"github.com/devigned/tab"
 )
 
+const sessionFilterName = "com.microsoft:session-filter"
+
 type (
 	// Receiver provides connection, session and link handling for a receiving to an entity path
 	Receiver struct {
@@ -408,33 +412,43 @@ func (r *Receiver) newSessionAndLink(ctx context.Context) error {
 		opts = append(opts, amqp.LinkSenderSettle(amqp.ModeSettled))
 	}
 
-	if opt, ok := r.getSessionFilterLinkOption(); ok {
-		opts = append(opts, opt)
+	sessionOpt, useSessionOpt := r.getSessionFilterLinkOption()
+	if useSessionOpt {
+		opts = append(opts, sessionOpt)
 	}
 
 	amqpReceiver, err := amqpSession.NewReceiver(opts...)
 	if err != nil {
 		tab.For(ctx).Error(err)
 		return err
 	}
-
 	r.receiver = amqpReceiver
+	if useSessionOpt {
+		rawsid := r.receiver.LinkSourceFilterValue(sessionFilterName)
+		if rawsid == nil && r.sessionID == nil {
+			return errors.New("failed to create a receiver.  no unlocked sessions available")
+		} else if rawsid != nil && r.sessionID != nil && rawsid != *r.sessionID {
+			return fmt.Errorf("failed to create a receiver for session %s, it may be locked by another receiver", rawsid)
+		} else if r.sessionID == nil {
+			sid := rawsid.(string)
+			r.sessionID = &sid
+		}
+	}
 	return nil
 }
 
 func (r *Receiver) getSessionFilterLinkOption() (amqp.LinkOption, bool) {
-	const name = "com.microsoft:session-filter"
 	const code = uint64(0x00000137000000C)
 
 	if !r.useSessions {
 		return nil, false
 	}
 
 	if r.sessionID == nil {
-		return amqp.LinkSourceFilter(name, code, nil), true
+		return amqp.LinkSourceFilter(sessionFilterName, code, nil), true
 	}
 
-	return amqp.LinkSourceFilter(name, code, r.sessionID), true
+	return amqp.LinkSourceFilter(sessionFilterName, code, r.sessionID), true
 }
 
 func messageID(msg *amqp.Message) interface{} {

session.go

@@ -336,6 +336,10 @@ func (qs *QueueSession) ensureReceiver(ctx context.Context) error {
 	}
 
 	qs.receiver = r
+	if qs.sessionID == nil {
+		// propagate the acquired session ID from the receiver
+		qs.sessionID = qs.receiver.sessionID
+	}
 	return nil
 }
 
@@ -474,6 +478,10 @@ func (ss *SubscriptionSession) ensureReceiver(ctx context.Context) error {
 	}
 
 	ss.receiver = r
+	if ss.sessionID == nil {
+		// propagate the acquired session ID from the receiver
+		ss.sessionID = ss.receiver.sessionID
+	}
 	return nil
 }