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Add a mechanism for adding new products and associating them with
barcodes.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,6 @@ | ||
| create keyspace starstock; | ||
| use starstock; | ||
| create column family products with key_validation_class = 'LexicalUUIDType' and comparator = 'AsciiType' and column_metadata = [{column_name: name, validation_class: UTF8Type, index_type: KEYS}, {column_name: price, validation_class: DoubleType, index_type: KEYS}, {column_name: vendor, validation_class: LexicalUUIDType, index_type: KEYS}, {column_name: barcodes, validation_class: BytesType, index_type: 0}]; | ||
| create column family vendors with key_validation_class = 'LexicalUUIDType' and comparator = 'AsciiType' and column_metadata = [{column_name: name, validation_class: UTF8Type, index_type: KEYS}, {column_name: address, validation_class: UTF8Type, index_type: 0}, {column_name: comments, validation_class: UTF8Type, index_type: 0}]; | ||
| create column family products_byname with key_validation_class = 'UTF8Type' and comparator = 'AsciiType' and column_metadata = [{column_name: product, validation_class: LexicalUUIDType, index_type: KEYS}]; | ||
| create column family products_bybarcode with key_validation_class = 'AsciiType' and comparator = 'AsciiType' and column_metadata = [{column_name: product, validation_class: LexicalUUIDType, index_type: KEYS}]; |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,217 @@ | ||
| /* | ||
| * (c) 2013, Caoimhe Chaos <[email protected]>, | ||
| * Starship Factory. All rights reserved. | ||
| * | ||
| * Redistribution and use in source and binary forms, with or without | ||
| * modification, are permitted provided that the following conditions | ||
| * are met: | ||
| * | ||
| * * Redistributions of source code must retain the above copyright | ||
| * notice, this list of conditions and the following disclaimer. | ||
| * * Redistributions in binary form must reproduce the above copyright | ||
| * notice, this list of conditions and the following disclaimer in | ||
| * the documentation and/or other materials provided with the | ||
| * distribution. | ||
| * * Neither the name of the Starship Factory nor the name of its | ||
| * contributors may be used to endorse or promote products derived | ||
| * from this software without specific prior written permission. | ||
| * | ||
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | ||
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES OF MERCHANTABILITY | ||
| * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT | ||
| * SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, | ||
| * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES | ||
| * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR | ||
| * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | ||
| * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | ||
| * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | ||
| * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED | ||
| * OF THE POSSIBILITY OF SUCH DAMAGE. | ||
| */ | ||
|
|
||
| package main | ||
|
|
||
| import ( | ||
| "bytes" | ||
| "crypto/rand" | ||
| "database/cassandra" | ||
| "encoding/binary" | ||
| "expvar" | ||
| "io" | ||
| "log" | ||
| "net/http" | ||
| "regexp" | ||
| "strings" | ||
| "time" | ||
|
|
||
| "ancient-solutions.com/ancientauth" | ||
| "code.google.com/p/goprotobuf/proto" | ||
| ) | ||
|
|
||
| const NUM_100NS_INTERVALS_SINCE_UUID_EPOCH = 0x01b21dd213814000 | ||
|
|
||
| // Number of errors which occurred adding products, mapped by type. | ||
| var productAddErrors *expvar.Map = expvar.NewMap("num-product-add-errors") | ||
|
|
||
| type ProductAddAPI struct { | ||
| authenticator *ancientauth.Authenticator | ||
| client *cassandra.RetryCassandraClient | ||
| scope string | ||
| } | ||
|
|
||
| func GenTimeUUID(when *time.Time) ([]byte, error) { | ||
| var uuid *bytes.Buffer = new(bytes.Buffer) | ||
| var stamp int64 = when.UnixNano()/100 + NUM_100NS_INTERVALS_SINCE_UUID_EPOCH | ||
| var stampLow int64 = stamp & 0xffffffff | ||
| var stampMid int64 = stamp & 0xffff00000000 | ||
| var stampHi int64 = stamp & 0xfff000000000000 | ||
| var err error | ||
|
|
||
| var upper int64 = (stampLow << 32) | (stampMid >> 16) | (1 << 12) | | ||
| (stampHi >> 48) | ||
|
|
||
| err = binary.Write(uuid, binary.LittleEndian, upper) | ||
| if err != nil { | ||
| return []byte{}, err | ||
| } | ||
| uuid.WriteByte(0xC0) | ||
| uuid.WriteByte(0x00) | ||
|
|
||
| _, err = io.CopyN(uuid, rand.Reader, 6) | ||
| if err != nil { | ||
| return []byte{}, err | ||
| } | ||
|
|
||
| return uuid.Bytes(), nil | ||
| } | ||
|
|
||
| func (self *ProductAddAPI) ServeHTTP(w http.ResponseWriter, req *http.Request) { | ||
| var uuid []byte | ||
| var mmap map[string]map[string][]*cassandra.Mutation | ||
| var mutations []*cassandra.Mutation | ||
| var mutation *cassandra.Mutation | ||
| var col *cassandra.Column | ||
| var ire *cassandra.InvalidRequestException | ||
| var ue *cassandra.UnavailableException | ||
| var te *cassandra.TimedOutException | ||
| var prodname, barcode string | ||
| var now time.Time = time.Now() | ||
| var err error | ||
| var match bool | ||
|
|
||
| numRequests.Add(1) | ||
| numAPIRequests.Add(1) | ||
|
|
||
| // Check the user is in the reqeuested scope. | ||
| if !self.authenticator.IsAuthenticatedScope(req, self.scope) { | ||
| numDisallowedScope.Add(1) | ||
| http.Error(w, | ||
| "You are not in the right group to access this resource", | ||
| http.StatusForbidden) | ||
| return | ||
| } | ||
|
|
||
| // Check if the product name has been specified. | ||
| prodname = req.PostFormValue("prodname") | ||
| if len(prodname) <= 0 { | ||
| http.Error(w, "Product name empty", http.StatusNotAcceptable) | ||
| return | ||
| } | ||
|
|
||
| // Check if the barcode has been given. If it was, it needs to be | ||
| // numeric (EAN-13). If we find different types of barcodes we can | ||
| // always revise this. | ||
| barcode = strings.Replace(req.PostFormValue("barcode"), " ", "", -1) | ||
| if len(barcode) > 0 { | ||
| match, err = regexp.MatchString("^[0-9]+$", barcode) | ||
| if err != nil { | ||
| productAddErrors.Add(err.Error(), 1) | ||
| http.Error(w, err.Error(), http.StatusInternalServerError) | ||
| return | ||
| } | ||
| if !match { | ||
| productAddErrors.Add("barcode-format-error", 1) | ||
| http.Error(w, "Barcode should only contain numbers", | ||
| http.StatusNotAcceptable) | ||
| return | ||
| } | ||
| } | ||
|
|
||
| col = cassandra.NewColumn() | ||
| col.Name = []byte("name") | ||
| col.Value = []byte(prodname) | ||
| col.Timestamp = now.Unix() | ||
| mutation = cassandra.NewMutation() | ||
| mutation.ColumnOrSupercolumn = cassandra.NewColumnOrSuperColumn() | ||
| mutation.ColumnOrSupercolumn.Column = col | ||
| mutations = append(mutations, mutation) | ||
|
|
||
| if len(barcode) > 0 { | ||
| var codes *Barcodes = new(Barcodes) | ||
| codes.Barcode = append(codes.Barcode, barcode) | ||
|
|
||
| col = cassandra.NewColumn() | ||
| col.Name = []byte("barcodes") | ||
| col.Value, err = proto.Marshal(codes) | ||
| if err != nil { | ||
| productAddErrors.Add(err.Error(), 1) | ||
| http.Error(w, err.Error(), http.StatusInternalServerError) | ||
| return | ||
| } | ||
| col.Timestamp = now.Unix() | ||
| mutation = cassandra.NewMutation() | ||
| mutation.ColumnOrSupercolumn = cassandra.NewColumnOrSuperColumn() | ||
| mutation.ColumnOrSupercolumn.Column = col | ||
| mutations = append(mutations, mutation) | ||
| } | ||
|
|
||
| uuid, err = GenTimeUUID(&now) | ||
| if err != nil { | ||
| productAddErrors.Add(err.Error(), 1) | ||
| http.Error(w, err.Error(), http.StatusInternalServerError) | ||
| return | ||
| } | ||
| mmap = make(map[string]map[string][]*cassandra.Mutation) | ||
| mmap[string(uuid)] = make(map[string][]*cassandra.Mutation) | ||
| mmap[string(uuid)]["products"] = mutations | ||
|
|
||
| mutations = make([]*cassandra.Mutation, 0) | ||
| col = cassandra.NewColumn() | ||
| col.Name = []byte("product") | ||
| col.Value = uuid | ||
| col.Timestamp = now.Unix() | ||
| mutation = cassandra.NewMutation() | ||
| mutation.ColumnOrSupercolumn = cassandra.NewColumnOrSuperColumn() | ||
| mutation.ColumnOrSupercolumn.Column = col | ||
| mutations = append(mutations, mutation) | ||
| mmap[prodname] = make(map[string][]*cassandra.Mutation) | ||
| mmap[prodname]["products_byname"] = mutations | ||
|
|
||
| if len(barcode) > 0 { | ||
| mmap[barcode] = make(map[string][]*cassandra.Mutation) | ||
| mmap[barcode]["products_bybarcode"] = mutations | ||
| } | ||
|
|
||
| ire, ue, te, err = self.client.BatchMutate(mmap, | ||
| cassandra.ConsistencyLevel_QUORUM) | ||
| if ire != nil { | ||
| log.Println("Invalid request: ", ire.Why) | ||
| productAddErrors.Add(ire.Why, 1) | ||
| return | ||
| } | ||
| if ue != nil { | ||
| log.Println("Unavailable") | ||
| productAddErrors.Add("unavailable", 1) | ||
| return | ||
| } | ||
| if te != nil { | ||
| log.Println("Request to database backend timed out") | ||
| productAddErrors.Add("timeout", 1) | ||
| return | ||
| } | ||
| if err != nil { | ||
| log.Println("Generic error: ", err) | ||
| productAddErrors.Add(err.Error(), 1) | ||
| return | ||
| } | ||
| } |
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