コード例 #1
0
ファイル: pools.go プロジェクト: ryanslade/go-couchbase
func (b *Bucket) Refresh() error {
	pool := b.pool
	tmpb := &Bucket{}
	err := pool.client.parseURLResponse(b.URI, tmpb)
	if err != nil {
		return err
	}

	pools := b.getConnPools()

	// We need this lock to ensure that bucket refreshes happening because
	// of NMVb errors received during bulkGet do not end up over-writing
	// pool.inUse.
	b.Lock()

	for _, pool := range pools {
		if pool != nil {
			pool.inUse = false
		}
	}

	newcps := make([]*connectionPool, len(tmpb.VBSMJson.ServerList))
	for i := range newcps {

		pool := b.getConnPoolByHost(tmpb.VBSMJson.ServerList[i])
		if pool != nil && pool.inUse == false {
			// if the hostname and index is unchanged then reuse this pool
			newcps[i] = pool
			pool.inUse = true
			continue
		}

		if b.ah != nil {
			newcps[i] = newConnectionPool(
				tmpb.VBSMJson.ServerList[i],
				b.ah, PoolSize, PoolOverflow)

		} else {
			newcps[i] = newConnectionPool(
				tmpb.VBSMJson.ServerList[i],
				b.authHandler(), PoolSize, PoolOverflow)
		}
	}
	b.replaceConnPools2(newcps)
	tmpb.ah = b.ah
	atomic.StorePointer(&b.vBucketServerMap, unsafe.Pointer(&tmpb.VBSMJson))

	b.nodeListLock.Lock()
	atomic.StorePointer(&b.nodeList, unsafe.Pointer(&tmpb.NodesJSON))
	b.nodeListLock.Unlock()

	b.Unlock()
	return nil
}
コード例 #2
0
ファイル: streaming.go プロジェクト: nimishzynga/go-couchbase
func (b *Bucket) UpdateBucket() error {

	var failures int
	var returnErr error

	for {

		if failures == MAX_RETRY_COUNT {
			log.Printf(" Maximum failures reached. Exiting loop...")
			return fmt.Errorf("Max failures reached. Last Error %v", returnErr)
		}

		nodes := b.Nodes()
		if len(nodes) < 1 {
			return fmt.Errorf("No healthy nodes found")
		}

		startNode := rand.Intn(len(nodes))
		node := nodes[(startNode)%len(nodes)]

		streamUrl := fmt.Sprintf("http://%s/pools/default/bucketsStreaming/%s", node.Hostname, b.Name)
		log.Printf(" Trying with %s", streamUrl)
		req, err := http.NewRequest("GET", streamUrl, nil)
		if err != nil {
			return err
		}

		err = maybeAddAuth(req, b.pool.client.ah)
		if err != nil {
			return err
		}

		res, err := doHTTPRequestForUpdate(req)
		if err != nil {
			return err
		}

		if res.StatusCode != 200 {
			bod, _ := ioutil.ReadAll(io.LimitReader(res.Body, 512))
			log.Printf("Failed to connect to host, unexpected status code: %v. Body %s", res.StatusCode, bod)
			res.Body.Close()
			returnErr = fmt.Errorf("Failed to connect to host. Status %v Body %s", res.StatusCode, bod)
			failures++
			continue
		}

		dec := json.NewDecoder(res.Body)

		tmpb := &Bucket{}
		for {

			err := dec.Decode(&tmpb)
			if err != nil {
				log.Printf(" Unable to decode response %v", err)
				returnErr = err
				res.Body.Close()
				break
			}

			// if we got here, reset failure count
			failures = 0
			b.Lock()

			// mark all the old connection pools for deletion
			pools := b.getConnPools()
			for _, pool := range pools {
				if pool != nil {
					pool.inUse = false
				}
			}

			newcps := make([]*connectionPool, len(tmpb.VBSMJson.ServerList))
			for i := range newcps {
				// get the old connection pool and check if it is still valid
				pool := b.getConnPoolByHost(tmpb.VBSMJson.ServerList[i])
				if pool != nil && pool.inUse == false {
					// if the hostname and index is unchanged then reuse this pool
					newcps[i] = pool
					pool.inUse = true
					continue
				}
				// else create a new pool
				if b.ah != nil {
					newcps[i] = newConnectionPool(
						tmpb.VBSMJson.ServerList[i],
						b.ah, PoolSize, PoolOverflow)

				} else {
					newcps[i] = newConnectionPool(
						tmpb.VBSMJson.ServerList[i],
						b.authHandler(), PoolSize, PoolOverflow)
				}
			}

			b.replaceConnPools2(newcps)

			tmpb.ah = b.ah
			atomic.StorePointer(&b.vBucketServerMap, unsafe.Pointer(&tmpb.VBSMJson))
			atomic.StorePointer(&b.nodeList, unsafe.Pointer(&tmpb.NodesJSON))
			b.Unlock()

			log.Printf("Got new configuration for bucket %s", b.Name)

		}
		// we are here because of an error
		failures++
		continue

	}
	return nil
}