Added support for setting logger for each log level

Author: Triston Whetten

conn.go

@@ -65,9 +65,9 @@ type Conn struct {
 
 	delegate ConnDelegate
 
-	logger   logger
+	logger   []logger
 	logLvl   LogLevel
-	logFmt   string
+	logFmt   []string
 	logGuard sync.RWMutex
 
 	r io.Reader
@@ -103,6 +103,9 @@ func NewConn(addr string, config *Config, delegate ConnDelegate) *Conn {
 		msgResponseChan: make(chan *msgResponse),
 		exitChan:        make(chan int),
 		drainReady:      make(chan int),
+
+		logger: make([]logger, LogLevelMax+1),
+		logFmt: make([]string, LogLevelMax+1),
 	}
 }
 
@@ -122,19 +125,44 @@ func (c *Conn) SetLogger(l logger, lvl LogLevel, format string) {
 	c.logGuard.Lock()
 	defer c.logGuard.Unlock()
 
-	c.logger = l
-	c.logLvl = lvl
-	c.logFmt = format
-	if c.logFmt == "" {
-		c.logFmt = "(%s)"
+	for level := range c.logger {
+		c.logger[level] = l
+		c.logFmt[level] = format
+		if c.logFmt[level] == "" {
+			c.logFmt[level] = "(%s)"
+		}
 	}
+	c.logLvl = lvl
+}
+
+func (c *Conn) SetLoggerForLevel(l logger, lvl LogLevel, format string) {
+	c.logGuard.Lock()
+	defer c.logGuard.Unlock()
+
+	c.logger[lvl] = l
+	c.logFmt[lvl] = format
+}
+
+// SetLoggerLevel sets the package logging level.
+func (c *Conn) SetLoggerLevel(lvl LogLevel) {
+	c.logGuard.Lock()
+	defer c.logGuard.Unlock()
+
+	c.logLvl = lvl
+}
+
+func (c *Conn) getLogger(lvl LogLevel) (logger, LogLevel, string) {
+	c.logGuard.RLock()
+	defer c.logGuard.RUnlock()
+
+	return c.logger[lvl], c.logLvl, c.logFmt[lvl]
 }
 
-func (c *Conn) getLogger() (logger, LogLevel, string) {
+func (c *Conn) getLogLevel() LogLevel {
 	c.logGuard.RLock()
 	defer c.logGuard.RUnlock()
 
-	return c.logger, c.logLvl, c.logFmt
+	return c.logLvl
 }
 
 // Connect dials and bootstraps the nsqd connection
@@ -718,7 +746,7 @@ func (c *Conn) onMessageTouch(m *Message) {
 }
 
 func (c *Conn) log(lvl LogLevel, line string, args ...interface{}) {
-	logger, logLvl, logFmt := c.getLogger()
+	logger, logLvl, logFmt := c.getLogger(lvl)
 
 	if logger == nil {
 		return

consumer.go

@@ -95,7 +95,7 @@ type Consumer struct {
 
 	mtx sync.RWMutex
 
-	logger   logger
+	logger   []logger
 	logLvl   LogLevel
 	logGuard sync.RWMutex
 
@@ -166,7 +166,7 @@ func NewConsumer(topic string, channel string, config *Config) (*Consumer, error
 		channel: channel,
 		config:  *config,
 
-		logger:      log.New(os.Stderr, "", log.Flags()),
+		logger:      make([]logger, LogLevelMax+1),
 		logLvl:      LogLevelInfo,
 		maxInFlight: int32(config.MaxInFlight),
 
@@ -183,6 +183,13 @@ func NewConsumer(topic string, channel string, config *Config) (*Consumer, error
 		StopChan: make(chan int),
 		exitChan: make(chan int),
 	}
+
+	// Set default logger for all log levels
+	l := log.New(os.Stderr, "", log.Flags())
+	for index := range r.logger {
+		r.logger[index] = l
+	}
+
 	r.wg.Add(1)
 	go r.rdyLoop()
 	return r, nil
@@ -219,22 +226,40 @@ func (r *Consumer) SetLogger(l logger, lvl LogLevel) {
 	r.logGuard.Lock()
 	defer r.logGuard.Unlock()
 
-	r.logger = l
+	for level := range r.logger {
+		r.logger[level] = l
+	}
 	r.logLvl = lvl
 }
 
+// SetLoggerForLevel assigns the same logger for specified `level`.
+func (r *Consumer) SetLoggerForLevel(l logger, lvl LogLevel) {
+	r.logGuard.Lock()
+	defer r.logGuard.Unlock()
+
+	r.logger[lvl] = l
+}
+
+// SetLoggerLevel sets the package logging level.
 func (r *Consumer) SetLoggerLevel(lvl LogLevel) {
 	r.logGuard.Lock()
 	defer r.logGuard.Unlock()
 
 	r.logLvl = lvl
 }
 
-func (r *Consumer) getLogger() (logger, LogLevel) {
+func (r *Consumer) getLogger(lvl LogLevel) (logger, LogLevel) {
 	r.logGuard.RLock()
 	defer r.logGuard.RUnlock()
 
-	return r.logger, r.logLvl
+	return r.logger[lvl], r.logLvl
+}
+
+func (r *Consumer) getLogLevel() LogLevel {
+	r.logGuard.RLock()
+	defer r.logGuard.RUnlock()
+
+	return r.logLvl
 }
 
 // SetBehaviorDelegate takes a type implementing one or more
@@ -530,12 +555,12 @@ func (r *Consumer) ConnectToNSQD(addr string) error {
 
 	atomic.StoreInt32(&r.connectedFlag, 1)
 
-	logger, logLvl := r.getLogger()
-
 	conn := NewConn(addr, &r.config, &consumerConnDelegate{r})
-	conn.SetLogger(logger, logLvl,
-		fmt.Sprintf("%3d [%s/%s] (%%s)", r.id, r.topic, r.channel))
-
+	conn.SetLoggerLevel(r.getLogLevel())
+	for index := range r.logger {
+		conn.SetLoggerForLevel(r.logger[index], LogLevel(index),
+			fmt.Sprintf("%3d [%s/%s] (%%s)", r.id, r.topic, r.channel))
+	}
 	r.mtx.Lock()
 	_, pendingOk := r.pendingConnections[addr]
 	_, ok := r.connections[addr]
@@ -1156,7 +1181,7 @@ func (r *Consumer) exit() {
 }
 
 func (r *Consumer) log(lvl LogLevel, line string, args ...interface{}) {
-	logger, logLvl := r.getLogger()
+	logger, logLvl := r.getLogger(lvl)
 
 	if logger == nil {
 		return

delegates.go

@@ -15,6 +15,7 @@ const (
 	LogLevelInfo
 	LogLevelWarning
 	LogLevelError
+	LogLevelMax = iota - 1 // convenience - match highest log level
 )
 
 // String returns the string form for a given LogLevel

producer.go

@@ -12,6 +12,8 @@ import (
 type producerConn interface {
 	String() string
 	SetLogger(logger, LogLevel, string)
+	SetLoggerLevel(LogLevel)
+	SetLoggerForLevel(logger, LogLevel, string)
 	Connect() (*IdentifyResponse, error)
 	Close() error
 	WriteCommand(*Command) error
@@ -28,7 +30,7 @@ type Producer struct {
 	conn   producerConn
 	config Config
 
-	logger   logger
+	logger   []logger
 	logLvl   LogLevel
 	logGuard sync.RWMutex
 
@@ -80,14 +82,20 @@ func NewProducer(addr string, config *Config) (*Producer, error) {
 		addr:   addr,
 		config: *config,
 
-		logger: log.New(os.Stderr, "", log.Flags()),
+		logger: make([]logger, int(LogLevelMax+1)),
 		logLvl: LogLevelInfo,
 
 		transactionChan: make(chan *ProducerTransaction),
 		exitChan:        make(chan int),
 		responseChan:    make(chan []byte),
 		errorChan:       make(chan []byte),
 	}
+
+	// Set default logger for all log levels
+	l := log.New(os.Stderr, "", log.Flags())
+	for index, _ := range p.logger {
+		p.logger[index] = l
+	}
 	return p, nil
 }
 
@@ -119,15 +127,40 @@ func (w *Producer) SetLogger(l logger, lvl LogLevel) {
 	w.logGuard.Lock()
 	defer w.logGuard.Unlock()
 
-	w.logger = l
+	for level := range w.logger {
+		w.logger[level] = l
+	}
 	w.logLvl = lvl
 }
 
-func (w *Producer) getLogger() (logger, LogLevel) {
+// SetLoggerForLevel assigns the same logger for specified `level`.
+func (w *Producer) SetLoggerForLevel(l logger, lvl LogLevel) {
+	w.logGuard.Lock()
+	defer w.logGuard.Unlock()
+
+	w.logger[lvl] = l
+}
+
+// SetLoggerLevel sets the package logging level.
+func (w *Producer) SetLoggerLevel(lvl LogLevel) {
+	w.logGuard.Lock()
+	defer w.logGuard.Unlock()
+
+	w.logLvl = lvl
+}
+
+func (w *Producer) getLogger(lvl LogLevel) (logger, LogLevel) {
+	w.logGuard.RLock()
+	defer w.logGuard.RUnlock()
+
+	return w.logger[lvl], w.logLvl
+}
+
+func (w *Producer) getLogLevel() LogLevel {
 	w.logGuard.RLock()
 	defer w.logGuard.RUnlock()
 
-	return w.logger, w.logLvl
+	return w.logLvl
 }
 
 // String returns the address of the Producer
@@ -273,10 +306,11 @@ func (w *Producer) connect() error {
 
 	w.log(LogLevelInfo, "(%s) connecting to nsqd", w.addr)
 
-	logger, logLvl := w.getLogger()
-
 	w.conn = NewConn(w.addr, &w.config, &producerConnDelegate{w})
-	w.conn.SetLogger(logger, logLvl, fmt.Sprintf("%3d (%%s)", w.id))
+	w.conn.SetLoggerLevel(w.getLogLevel())
+	for index := range w.logger {
+		w.conn.SetLoggerForLevel(w.logger[index], LogLevel(index), fmt.Sprintf("%3d (%%s)", w.id))
+	}
 
 	_, err := w.conn.Connect()
 	if err != nil {
@@ -369,7 +403,7 @@ func (w *Producer) transactionCleanup() {
 }
 
 func (w *Producer) log(lvl LogLevel, line string, args ...interface{}) {
-	logger, logLvl := w.getLogger()
+	logger, logLvl := w.getLogger(lvl)
 
 	if logger == nil {
 		return

producer_test.go

@@ -305,6 +305,10 @@ func (m *mockProducerConn) String() string {
 
 func (m *mockProducerConn) SetLogger(logger logger, level LogLevel, prefix string) {}
 
+func (m *mockProducerConn) SetLoggerLevel(lvl LogLevel) {}
+
+func (m *mockProducerConn) SetLoggerForLevel(logger logger, level LogLevel, format string) {}
+
 func (m *mockProducerConn) Connect() (*IdentifyResponse, error) {
 	return &IdentifyResponse{}, nil
 }