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Made error handling for redis client less code noisy.

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This commit is contained in:
Sascha L. Teichmann 2014-08-03 09:02:18 +02:00
parent 0b11ac01db
commit 8a8351e8c1
1 changed files with 57 additions and 72 deletions
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129
main.go
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@ -43,17 +43,9 @@ func (c *connection) Hget(hash, key []byte) bool {
defer ro.Close()
if data, err = c.db.Get(ro, key); err != nil {
log.Printf("Something is wrong with db: %s", err)
if err = c.writeError(); err != nil {
log.Printf("Send message to client failed: %s", err)
return false
}
} else {
if err = c.writeBlock(data); err != nil {
log.Printf("Send message to client failed: %s", err)
return false
}
return c.writeError()
}
return true
return c.writeBlock(data)
}
func (c *connection) Hset(hash, key, block []byte) bool {
@ -64,37 +56,22 @@ func (c *connection) Hset(hash, key, block []byte) bool {
if exists, err = c.keyExists(key); err != nil {
log.Printf("Something is wrong with db: %s", err)
if err = c.writeError(); err != nil {
log.Printf("Writing message to client failed: %s", err)
return false
}
return true
return c.writeError()
}
if c.tx != nil {
c.tx.Put(key, block)
c.intArray = append(c.intArray, exists)
if err = c.writeQueued(); err != nil {
log.Printf("Writing message to client failed: %s", err)
return false
}
return true
return c.writeQueued()
}
wo := leveldb.NewWriteOptions()
defer wo.Close()
if err = c.db.Put(wo, key, block); err != nil {
log.Printf("Something is wrong with db: %s", err)
if err = c.writeError(); err != nil {
log.Printf("Writing message to client failed: %s", err)
return false
}
return true
return c.writeError()
}
if err = c.writeInteger(exists); err != nil {
log.Printf("Writing message to client failed: %s", err)
return false
}
return true
return c.writeInteger(exists)
}
func (c *connection) keyExists(key []byte) (exists int, err error) {
@ -118,21 +95,13 @@ func (c *connection) Multi() bool {
} else {
c.tx = leveldb.NewWriteBatch()
}
if err := c.writeOk(); err != nil {
log.Printf("Writing message to client failed: %s", err)
return false
}
return true
return c.writeOk()
}
func (c *connection) Exec() bool {
var err error
if c.tx == nil {
if err = c.writeEmptyArray(); err != nil {
log.Printf("Writing message to client failed: %s", err)
return false
}
return true
return c.writeEmptyArray()
}
tx := c.tx
c.tx = nil
@ -143,17 +112,9 @@ func (c *connection) Exec() bool {
defer wo.Close()
if err = c.db.Write(wo, tx); err != nil {
log.Printf("Something went wrong in writing transaction: %s", err)
if err = c.writeError(); err != nil {
log.Printf("Writing message to client failed: %s", err)
return false
}
return true
return c.writeError()
}
if err = c.writeIntegerArray(arr); err != nil {
log.Printf("Writing message to client failed: %s", err)
return false
}
return true
return c.writeIntegerArray(arr)
}
var (
@ -165,44 +126,68 @@ var (
redisQueued = []byte("+QUEUED\r\n")
)
func (c *connection) writeError() (err error) {
_, err = c.conn.Write(redisDbError)
return
func (c *connection) writeError() bool {
if _, err := c.conn.Write(redisDbError); err != nil {
log.Printf("Something went wrong writing to client %s", err)
return false
}
return true
}
func (c *connection) writeEmptyArray() (err error) {
_, err = c.conn.Write(redisDbError)
return
func (c *connection) writeEmptyArray() bool {
if _, err := c.conn.Write(redisDbError); err != nil {
log.Printf("Writing message to client failed: %s", err)
return false
}
return true
}
func (c *connection) writeInteger(v int) (err error) {
_, err = c.conn.Write([]byte(fmt.Sprintf(":%d\r\n", v)))
return
func (c *connection) writeInteger(v int) bool {
if _, err := c.conn.Write([]byte(fmt.Sprintf(":%d\r\n", v))); err != nil {
log.Printf("Writing message to client failed: %s", err)
return false
}
return true
}
func (c *connection) writeIntegerArray(arr []int) (err error) {
if _, err = c.conn.Write([]byte(fmt.Sprintf("*%d\r\n", len(arr)))); err != nil {
return
func (c *connection) writeIntegerArray(arr []int) bool {
if _, err := c.conn.Write([]byte(fmt.Sprintf("*%d\r\n", len(arr)))); err != nil {
log.Printf("Writing message to client failed: %s", err)
return false
}
for x := range arr {
if err = c.writeInteger(x); err != nil {
return
if !c.writeInteger(x) {
return false
}
}
return
return true
}
func (c *connection) writeOk() (err error) {
_, err = c.conn.Write(redisOk)
return
func (c *connection) writeOk() bool {
if _, err := c.conn.Write(redisOk); err != nil {
log.Printf("Something went wrong writing to client %s", err)
return false
}
return true
}
func (c *connection) writeQueued() (err error) {
_, err = c.conn.Write(redisQueued)
return
func (c *connection) writeQueued() bool {
if _, err := c.conn.Write(redisQueued); err != nil {
log.Printf("Something went wrong writing to client %s", err)
return false
}
return true
}
func (c *connection) writeBlock(data []byte) (err error) {
func (c *connection) writeBlock(data []byte) bool {
if err := c.writeBulkString(data); err != nil {
log.Printf("Something went wrong writing to client %s", err)
return false
}
return true
}
func (c *connection) writeBulkString(data []byte) (err error) {
con := c.conn
if data == nil {
_, err = con.Write(redisNoSuchBlock)