Commit 17a4d0447632580c46fe7bd46b54dd82dcca012b
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mutex lock for payloads
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json_utility.go
| 1 | package restutility | 1 | package restutility |
| 2 | 2 | ||
| 3 | import ( | 3 | import ( |
| 4 | "net/http" | 4 | "net/http" |
| 5 | "encoding/json" | 5 | "encoding/json" |
| 6 | "errors" | 6 | "errors" |
| 7 | "gopkg.in/rana/ora.v3" | 7 | "gopkg.in/rana/ora.v3" |
| 8 | "io" | 8 | "io" |
| 9 | "io/ioutil" | 9 | "io/ioutil" |
| 10 | "sync" | ||
| 10 | ) | 11 | ) |
| 11 | 12 | ||
| 13 | var mu = &sync.Mutex{} | ||
| 12 | var allPayloads []payloadBuff | 14 | var allPayloads []payloadBuff |
| 13 | 15 | ||
| 14 | type LangMap map[string]map[string]string | 16 | type LangMap map[string]map[string]string |
| 15 | 17 | ||
| 16 | type Field struct { | 18 | type Field struct { |
| 17 | Parameter string `json:"param"` | 19 | Parameter string `json:"param"` |
| 18 | Type string `json:"type"` | 20 | Type string `json:"type"` |
| 19 | Visible bool `json:"visible"` | 21 | Visible bool `json:"visible"` |
| 20 | Editable bool `json:"editable"` | 22 | Editable bool `json:"editable"` |
| 21 | } | 23 | } |
| 22 | 24 | ||
| 23 | type CorrelationField struct { | 25 | type CorrelationField struct { |
| 24 | Result string `json:"result"` | 26 | Result string `json:"result"` |
| 25 | Elements []string `json:"elements"` | 27 | Elements []string `json:"elements"` |
| 26 | Type string `json:"type"` | 28 | Type string `json:"type"` |
| 27 | } | 29 | } |
| 28 | 30 | ||
| 29 | type Translation struct { | 31 | type Translation struct { |
| 30 | Language string `json:"language"` | 32 | Language string `json:"language"` |
| 31 | FieldsLabels map[string]string `json:"fieldsLabels"` | 33 | FieldsLabels map[string]string `json:"fieldsLabels"` |
| 32 | } | 34 | } |
| 33 | 35 | ||
| 34 | // Field 'Type' is not required in payload. | 36 | // Field 'Type' is not required in payload. |
| 35 | // 'payloadBuff' type is only a bridge between ORACLE CLOB and 'Payload' type. | 37 | // 'payloadBuff' type is only a bridge between ORACLE CLOB and 'Payload' type. |
| 36 | type payloadBuff struct { | 38 | type payloadBuff struct { |
| 37 | Type string `json:"tableType"` | 39 | Type string `json:"tableType"` |
| 38 | Method string `json:"method"` | 40 | Method string `json:"method"` |
| 39 | Params map[string]string `json:"params"` | 41 | Params map[string]string `json:"params"` |
| 40 | Lang []Translation `json:"lang"` | 42 | Lang []Translation `json:"lang"` |
| 41 | Fields []Field `json:"fields"` | 43 | Fields []Field `json:"fields"` |
| 42 | Correlations []CorrelationField `json:"correlationFields"` | 44 | Correlations []CorrelationField `json:"correlationFields"` |
| 43 | IdField string `json:"idField"` | 45 | IdField string `json:"idField"` |
| 44 | // Data can only hold slices of any type. It can't be used for itteration | 46 | // Data can only hold slices of any type. It can't be used for itteration |
| 45 | Data interface{} `json:"data"` | 47 | Data interface{} `json:"data"` |
| 46 | } | 48 | } |
| 47 | 49 | ||
| 48 | type Payload struct { | 50 | type Payload struct { |
| 49 | Method string `json:"method"` | 51 | Method string `json:"method"` |
| 50 | Params map[string]string `json:"params"` | 52 | Params map[string]string `json:"params"` |
| 51 | Lang []Translation `json:"lang"` | 53 | Lang []Translation `json:"lang"` |
| 52 | Fields []Field `json:"fields"` | 54 | Fields []Field `json:"fields"` |
| 53 | Correlations []CorrelationField `json:"correlationFields"` | 55 | Correlations []CorrelationField `json:"correlationFields"` |
| 54 | IdField string `json:"idField"` | 56 | IdField string `json:"idField"` |
| 55 | // Data can only hold slices of any type. It can't be used for itteration | 57 | // Data can only hold slices of any type. It can't be used for itteration |
| 56 | Data interface{} `json:"data"` | 58 | Data interface{} `json:"data"` |
| 57 | } | 59 | } |
| 58 | 60 | ||
| 59 | func NewPayload(r *http.Request, table string) Payload { | 61 | func NewPayload(r *http.Request, table string) Payload { |
| 60 | var pload Payload | 62 | var pload Payload |
| 61 | 63 | ||
| 62 | pload.Method = r.Method + " " + r.URL.Path | 64 | pload.Method = r.Method + " " + r.URL.Path |
| 63 | 65 | ||
| 64 | if table != "" { | 66 | if table != "" { |
| 65 | pload.Params = make(map[string]string, 0) | 67 | pload.Params = make(map[string]string, 0) |
| 66 | pload.Lang = loadTranslations(table) | 68 | pload.Lang = loadTranslations(table) |
| 67 | pload.Fields = loadFields(table) | 69 | pload.Fields = loadFields(table) |
| 68 | pload.IdField = loadIdField(table) | 70 | pload.IdField = loadIdField(table) |
| 69 | pload.Correlations = loadCorrelations(table) | 71 | pload.Correlations = loadCorrelations(table) |
| 70 | } | 72 | } |
| 71 | 73 | ||
| 72 | return pload | 74 | return pload |
| 73 | } | 75 | } |
| 74 | 76 | ||
| 75 | func DeliverPayload(w http.ResponseWriter, payload Payload) { | 77 | func DeliverPayload(w http.ResponseWriter, payload Payload) { |
| 76 | json.NewEncoder(w).Encode(payload) | 78 | json.NewEncoder(w).Encode(payload) |
| 77 | payload.Data = nil | 79 | payload.Data = nil |
| 78 | } | 80 | } |
| 79 | 81 | ||
| 80 | func loadTranslations(id string) []Translation { | 82 | func loadTranslations(id string) []Translation { |
| 81 | translations := make([]Translation, 0) | 83 | translations := make([]Translation, 0) |
| 82 | 84 | ||
| 83 | for _, pload := range allPayloads { | 85 | for _, pload := range allPayloads { |
| 84 | if pload.Type == id { | 86 | if pload.Type == id { |
| 85 | for _, t := range pload.Lang { | 87 | for _, t := range pload.Lang { |
| 86 | //translations[t.Language] = t.FieldsLabels | 88 | //translations[t.Language] = t.FieldsLabels |
| 87 | translations = append(translations, Translation{ | 89 | translations = append(translations, Translation{ |
| 88 | Language: t.Language, | 90 | Language: t.Language, |
| 89 | FieldsLabels: t.FieldsLabels, | 91 | FieldsLabels: t.FieldsLabels, |
| 90 | }) | 92 | }) |
| 91 | } | 93 | } |
| 92 | } | 94 | } |
| 93 | } | 95 | } |
| 94 | 96 | ||
| 95 | return translations | 97 | return translations |
| 96 | } | 98 | } |
| 97 | 99 | ||
| 98 | func loadFields(id string) []Field { | 100 | func loadFields(id string) []Field { |
| 99 | fields := make([]Field, 0) | 101 | fields := make([]Field, 0) |
| 100 | 102 | ||
| 101 | for _, pload := range allPayloads { | 103 | for _, pload := range allPayloads { |
| 102 | if pload.Type == id{ | 104 | if pload.Type == id{ |
| 103 | for _, f := range pload.Fields { | 105 | for _, f := range pload.Fields { |
| 104 | fields = append(fields, f) | 106 | fields = append(fields, f) |
| 105 | } | 107 | } |
| 106 | } | 108 | } |
| 107 | } | 109 | } |
| 108 | 110 | ||
| 109 | return fields | 111 | return fields |
| 110 | } | 112 | } |
| 111 | 113 | ||
| 112 | func loadIdField(id string) string { | 114 | func loadIdField(id string) string { |
| 113 | for _, pload := range allPayloads { | 115 | for _, pload := range allPayloads { |
| 114 | if pload.Type == id { | 116 | if pload.Type == id { |
| 115 | return pload.IdField | 117 | return pload.IdField |
| 116 | } | 118 | } |
| 117 | } | 119 | } |
| 118 | return "" | 120 | return "" |
| 119 | } | 121 | } |
| 120 | 122 | ||
| 121 | func loadCorrelations(id string) []CorrelationField { | 123 | func loadCorrelations(id string) []CorrelationField { |
| 122 | resp := make([]CorrelationField, 0) | 124 | resp := make([]CorrelationField, 0) |
| 123 | 125 | ||
| 124 | for _, pload := range allPayloads { | 126 | for _, pload := range allPayloads { |
| 125 | if pload.Type == id { | 127 | if pload.Type == id { |
| 126 | for _, f := range pload.Correlations { | 128 | for _, f := range pload.Correlations { |
| 127 | resp = append(resp, f) | 129 | resp = append(resp, f) |
| 128 | } | 130 | } |
| 129 | } | 131 | } |
| 130 | } | 132 | } |
| 131 | 133 | ||
| 132 | return resp | 134 | return resp |
| 133 | } | 135 | } |
| 134 | 136 | ||
| 135 | func InitTables(db *ora.Ses, project string) error { | 137 | func InitTables(db *ora.Ses, project string) error { |
| 136 | jsonbuf, _ := fetchJSON(db, EqualQuotes(project)) | 138 | jsonbuf, _ := fetchJSON(db, EqualQuotes(project)) |
| 139 | mu.Lock() | ||
| 140 | defer mu.Unlock() | ||
| 137 | json.Unmarshal(jsonbuf, &allPayloads) | 141 | json.Unmarshal(jsonbuf, &allPayloads) |
| 138 | if len(allPayloads) == 0 { | 142 | if len(allPayloads) == 0 { |
| 139 | return errors.New("tables config is corrupt") | 143 | return errors.New("tables config is corrupt") |
| 140 | } | 144 | } |
| 141 | return nil | 145 | return nil |
| 142 | } | 146 | } |
| 143 | 147 | ||
| 144 | func fetchJSON(db *ora.Ses, project string) ([]byte, error) { | 148 | func fetchJSON(db *ora.Ses, project string) ([]byte, error) { |
| 145 | stmt, err := db.Prep(`SELECT | 149 | stmt, err := db.Prep(`SELECT |
| 146 | JSON_CLOB | 150 | JSON_CLOB |
| 147 | FROM TABLES_CONFIG | 151 | FROM TABLES_CONFIG |
| 148 | WHERE PROJEKAT` + project, ora.S) | 152 | WHERE PROJEKAT` + project, ora.S) |
| 149 | defer stmt.Close() | 153 | defer stmt.Close() |
| 150 | 154 | ||
| 151 | if err != nil { | 155 | if err != nil { |
| 152 | return nil, err | 156 | return nil, err |
| 153 | } | 157 | } |
| 154 | 158 | ||
| 155 | rset, err := stmt.Qry() | 159 | rset, err := stmt.Qry() |
| 156 | if err != nil { | 160 | if err != nil { |
| 157 | return nil, err | 161 | return nil, err |
| 158 | } | 162 | } |
| 159 | 163 | ||
| 160 | bytes := make([]byte, 0) | 164 | bytes := make([]byte, 0) |
| 161 | if rset.Next() { | 165 | if rset.Next() { |
| 162 | lob := rset.Row[0].(io.Reader) | 166 | lob := rset.Row[0].(io.Reader) |
| 163 | bytes, err = ioutil.ReadAll(lob) | 167 | bytes, err = ioutil.ReadAll(lob) |
| 164 | if err != nil { | 168 | if err != nil { |
| 165 | // Ignore for now, it's some weird streaming read/write LOB error. | 169 | // Ignore for now, it's some weird streaming read/write LOB error. |
| 166 | // TODO: Find a fix for this. | 170 | // TODO: Find a fix for this. |
| 167 | //return nil, err | 171 | //return nil, err |
| 168 | } | 172 | } |
| 169 | } | 173 | } |
| 170 | 174 | ||
| 171 | return bytes, nil | 175 | return bytes, nil |
| 172 | } | 176 | } |
| 173 | 177 | ||
| 174 | 178 |