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authoradam <adamansky@gmail.com>2013-07-17 16:22:28 +0700
committeradam <adamansky@gmail.com>2013-07-17 16:22:28 +0700
commit3760b5c06322d38ece51d77f975c174892f249f6 (patch)
treec17a6674015ae0145792b8f73751a48ea1475eb3 /README.md
parent8e879d132baa030b1fa485d74105518674a7113a (diff)
downloadejdb-3760b5c06322d38ece51d77f975c174892f249f6.tar.gz
ejdb-3760b5c06322d38ece51d77f975c174892f249f6.tar.bz2
ejdb-3760b5c06322d38ece51d77f975c174892f249f6.zip
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diff --git a/README.md b/README.md
index 834b7be..b9a6550 100644
--- a/README.md
+++ b/README.md
@@ -4,7 +4,7 @@
Embedded JSON Database engine
====================================
-It aims to be a fast [MongoDB](http://mongodb.org)-like library **which can be embedded into C/C++, .Net, NodeJS, Python, Lua, Java, Ruby, Go applications under terms of LGPL license.**
+It aims to be a fast [MongoDB](http://mongodb.org)-like library **which can be embedded into C/C++, .Net, NodeJS, Python, Lua, Go, Java and Ruby applications under terms of LGPL license.**
EJDB is the C library based on modified version of [Tokyo Cabinet](http://fallabs.com/tokyocabinet/).
@@ -43,24 +43,22 @@ Features
Documentation
================================
-* **[The great intro to the EJDB](http://blog.abigopal.com/post/51616277039/ejdb)**
+* **[The brief intro to the EJDB](http://blog.abigopal.com/post/51616277039/ejdb)**
* **[EJDB Command line interface](https://github.com/Softmotions/ejdb/wiki/EJDB-Command-line-interface)**
-* **[C# .Net] (https://github.com/Softmotions/ejdb/tree/master/nejdb)**
-* **[NodeJS](#nodejs-binding)**
- * [Installation](#installation)
- * [Samples](#ejdb-nodejs-samples)
- * [NodeJS API](#ejdb-nodejs-api)
-* **[Python 2.7/3.x](https://github.com/Softmotions/ejdb/blob/master/pyejdb/)**
-* **[Lua](https://github.com/Softmotions/ejdb/blob/master/luaejdb/)**
-* **[Java](https://github.com/Softmotions/ejdb/blob/master/jejdb/)**
-* **[Ruby](https://github.com/Softmotions/ejdb/blob/master/rbejdb/)**
-* **[Go](https://github.com/mkilling/goejdb/)**
-* **[Pike language] (https://github.com/hww3/pike_modules-ejdb)**
-* **[Adobe Air] (https://github.com/thejustinwalsh/airejdb)**
* **[EJDB C Library](#ejdb-c-library)**
* [Building & Installation](#building--installation)
* [Samples](#ejdb-c-samples)
* [C API](#c-api)
+* **Bindings**
+ * **[C# .Net] (https://github.com/Softmotions/ejdb/tree/master/nejdb)**
+ * **[NodeJS] (https://github.com/Softmotions/ejdb/blob/master/node/)**
+ * **[Python 2.7/3.x](https://github.com/Softmotions/ejdb/blob/master/pyejdb/)**
+ * **[Lua](https://github.com/Softmotions/ejdb/blob/master/luaejdb/)**
+ * **[Java](https://github.com/Softmotions/ejdb/blob/master/jejdb/)**
+ * **[Ruby](https://github.com/Softmotions/ejdb/blob/master/rbejdb/)**
+ * **[Go](https://github.com/mkilling/goejdb/)**
+ * **[Pike language] (https://github.com/hww3/pike_modules-ejdb)**
+ * **[Adobe Air] (https://github.com/thejustinwalsh/airejdb)**
* **[Collection joins](https://github.com/Softmotions/ejdb/wiki/Collection-joins)**
@@ -75,7 +73,7 @@ NodeJS binding
One snippet intro
---------------------------------
-```JavaScript
+```
var EJDB = require("ejdb");
//Open zoo DB
var jb = EJDB.open("zoo", EJDB.DEFAULT_OPEN_MODE | EJDB.JBOTRUNC);
@@ -123,488 +121,7 @@ jb.save("parrots", [parrot1, parrot2], function(err, oids) {
});
});
```
-
-Installation
---------------------------------
-**System libraries:**
-
-* g++
-* zlib
-
-On Debian/Ubuntu linux you can install it as follows:
-
-~~~~~~
-sudo apt-get install g++ zlib1g zlib1g-dev
-~~~~~~
-
-**Installation from node package manager on linux/macos:**
-
- npm install ejdb
-
-**[Installing EJDB NodeJS module on windows](https://github.com/Softmotions/ejdb/blob/master/tcejdb/WIN32.md#ejdb-nodejs-module-installation)**
-
-
-EJDB NodeJS samples
----------------------------------
-
-* [node/samples](https://github.com/Softmotions/ejdb/tree/master/node/samples)
-* [node/tests](https://github.com/Softmotions/ejdb/tree/master/node/tests)
-* [nwk-ejdb-address-book](https://github.com/Softmotions/nwk-ejdb-address-book)
-
-
-EJDB NodeJS API
-----------------------------------
-
-<a name="open" />
-### EJDB.open(dbFile, openMode)
-
-Open database. Return database instance handle object.
-<br/>Default open mode: `JBOWRITER | JBOCREAT`.
-<br/>This is blocking function.
-
-__Arguments__
-
- * {String} dbFile Database main file name
- * {Number} `[openMode=JBOWRITER | JBOCREAT]` Bitmast of open modes:
- - `JBOREADER` Open as a reader.
- - `JBOWRITER` Open as a writer.
- - `JBOCREAT` Create if db file not exists
- - `JBOTRUNC` Truncate db.
-
----------------------------------------
-
-<a name="close" />
-### close()
-
-Close database.
-<br/>If database was not opened it does nothing.
-<br/>This is blocking function.
-
----------------------------------------
-
-<a name="isOpen"/>
-### isOpen()
-Check if database in opened state.
-
----------------------------------------
-
-<a name="ensureCollection"/>
-### ensureCollection(cname, copts)
-
-Automatically creates new collection if it does't exists.
-Collection options `copts` applied only for newly created collection.
-For existing collections `copts` takes no effect.
-
-Collection options (copts):
-
- * cachedrecords : Max number of cached records in shared memory segment. Default: 0
- * records : Estimated number of records in this collection. Default: 65535.
- * large : Specifies that the size of the database can be larger than 2GB. Default: false
- * compressed : If true collection records will be compressed with DEFLATE compression. Default: false.
-
-<br/>This is blocking function.
-
-__Arguments__
-
- * {String} cname Name of collection.
- * {Object} `[copts]` Collection options.
-
----------------------------------------
-
-
-<a name="dropCollection"/>
-### dropCollection(cname, prune, cb)
-
-Drop collection.
-
-Call variations:
-
- dropCollection(cname)
- dropCollection(cname, cb)
- dropCollection(cname, prune, cb)
-
-__Arguments__
-
- * {String} cname Name of collection.
- * {Boolean} `[prune=false]` If true the collection data will erased from disk.
- * {Function} `[cb]` Callback args: (error)
-
----------------------------------------
-
-<a name="save"/>
-### save(cname, jsarr, cb)
-
-Save/update specified JSON objects in the collection.
-If collection with `cname` does not exists it will be created.
-
-Each persistent object has unique identifier (OID) placed in the `_id` property.
-If a saved object does not have `_id` it will be autogenerated.
-To identify and update object it should contains `_id` property.
-
-If callback is not provided this function will be synchronous.
-
-Call variations:
-
- save(cname, <json object>|<Array of json objects>, [options] [cb])
- save(cname, <json object>|<Array of json objects>, [cb])
-
-NOTE: Field names of passed JSON objects may not contain `$` and `.` characters,
- error condition will be fired in this case.
-
-__Arguments__
-
- * {String} **cname** Name of collection.
- * {Array|Object} jsarr Signle JSON object or array of JSON objects to save
- * {Function} `[cb]` Callback args: (error, {Array} of OIDs for saved objects)
-
-__Return__
-
- * {Array} of OIDs of saved objects in synchronous mode otherwise returns {undefined}.
-
---------------------------------------
-
-<a name="load"/>
-### load(cname, oid, cb)
-
-Loads JSON object identified by OID from the collection.
-If callback is not provided this function will be synchronous.
-
-__Arguments__
-
- * {String} cname Name of collection
- * {String} oid Object identifier (OID)
- * {Function} cb Callback args: (error, obj)
- `obj`: Retrieved JSON object or NULL if it is not found.
-
-__Return__
-
- * JSON object or {null} if it is not found in synchronous mode otherwise return {undefined}.
-
---------------------------------------
-
-<a name="remove"/>
-### remove(cname, oid, cb)
-
-Removes JSON object from the collection.
-If callback is not provided this function will be synchronous.
-
-__Arguments__
-
- * {String} cname Name of collection
- * {String} oid Object identifier (OID)
- * {Function} cb Callback args: (error)
-
-
---------------------------------------
-
-<a name="find"/>
-### find(cname, qobj, orarr, hints, cb)
-Execute query on collection.
-EJDB queries inspired by MongoDB (mongodb.org) and follows same philosophy.
-
- Supported queries:
- - Simple matching of String OR Number OR Array value:
- - {'fpath' : 'val', ...}
- - $not Negate operation.
- - {'fpath' : {'$not' : val}} //Field not equal to val
- - {'fpath' : {'$not' : {'$begin' : prefix}}} //Field not begins with val
- - $begin String starts with prefix
- - {'fpath' : {'$begin' : prefix}}
- - $gt, $gte (>, >=) and $lt, $lte for number types:
- - {'fpath' : {'$gt' : number}, ...}
- - $bt Between for number types:
- - {'fpath' : {'$bt' : [num1, num2]}}
- - $in String OR Number OR Array val matches to value in specified array:
- - {'fpath' : {'$in' : [val1, val2, val3]}}
- - $nin - Not IN
- - $strand String tokens OR String array val matches all tokens in specified array:
- - {'fpath' : {'$strand' : [val1, val2, val3]}}
- - $stror String tokens OR String array val matches any token in specified array:
- - {'fpath' : {'$stror' : [val1, val2, val3]}}
- - $exists Field existence matching:
- - {'fpath' : {'$exists' : true|false}}
- - $icase Case insensitive string matching:
- - {'fpath' : {'$icase' : 'val1'}} //icase matching
- Ignore case matching with '$in' operation:
- - {'name' : {'$icase' : {'$in' : ['tHéâtre - театр', 'heLLo WorlD']}}}
- For case insensitive matching you can create special type of string index.
- - $elemMatch The $elemMatch operator matches more than one component within an array element.
- - { array: { $elemMatch: { value1 : 1, value2 : { $gt: 1 } } } }
- Restriction: only one $elemMatch allowed in context of one array field.
-
- - Queries can be used to update records:
-
- $set Field set operation.
- - {.., '$set' : {'field1' : val1, 'fieldN' : valN}}
- $upsert Atomic upsert. If matching records are found it will be '$set' operation,
- otherwise new record will be inserted with fields specified by argment object.
- - {.., '$upsert' : {'field1' : val1, 'fieldN' : valN}}
- $inc Increment operation. Only number types are supported.
- - {.., '$inc' : {'field1' : number, ..., 'field1' : number}
- $dropall In-place record removal operation.
- - {.., '$dropall' : true}
- $addToSet Atomically adds value to the array only if its not in the array already.
- If containing array is missing it will be created.
- - {.., '$addToSet' : {'fpath' : val1, 'fpathN' : valN, ...}}
- $addToSetAll Batch version if $addToSet
- - {.., '$addToSetAll' : {'fpath' : [array of values to add], ...}}
- $pull Atomically removes all occurrences of value from field, if field is an array.
- - {.., '$pull' : {'fpath' : val1, 'fpathN' : valN, ...}}
- $pullAll Batch version of $pull
- - {.., '$pullAll' : {'fpath' : [array of values to remove], ...}}
-
- NOTE: It is better to execute update queries with `$onlycount=true` hint flag
- or use the special `update()` method to avoid unnecessarily rows fetching.
-
- NOTE: Negate operations: $not and $nin not using indexes
- so they can be slow in comparison to other matching operations.
-
- NOTE: Only one index can be used in search query operation.
-
- NOTE: If callback is not provided this function will be synchronous.
-
- QUERY HINTS (specified by `hints` argument):
- - $max Maximum number in the result set
- - $skip Number of skipped results in the result set
- - $orderby Sorting order of query fields.
- - $onlycount true|false If `true` only count of matching records will be returned
- without placing records in result set.
- - $fields Set subset of fetched fields
- If a field presented in $orderby clause it will be forced to include in resulting records.
- Example:
- hints: {
- "$orderby" : { //ORDER BY field1 ASC, field2 DESC
- "field1" : 1,
- "field2" : -1
- },
- "$fields" : { //SELECT ONLY {_id, field1, field2}
- "field1" : 1,
- "field2" : 1
- }
- }
-
- Many C API query examples can be found in `tcejdb/testejdb/t2.c` test case.
-
- To traverse selected records cursor object is used:
- - Cursor#next() Move cursor to the next record and returns true if next record exists.
- - Cursor#hasNext() Returns true if cursor can be placed to the next record.
- - Cursor#field(name) Retrieve value of the specified field of the current JSON object record.
- - Cursor#object() Retrieve whole JSON object with all fields.
- - Cursor#reset() Reset cursor to its initial state.
- - Cursor#length Read-only property: Number of records placed into cursor.
- - Cursor#pos Read/Write property: You can set cursor position: 0 <= pos < length
- - Cursor#close() Closes cursor and free cursor resources. Cursor cant be used in closed state.
-
- Call variations of find():
- - find(cname, [cb])
- - find(cname, qobj, [cb])
- - find(cname, qobj, hints, [cb])
- - find(cname, qobj, qobjarr, [cb])
- - find(cname, qobj, qobjarr, hints, [cb])
-
- __Arguments__
-
- * {String} cname Name of collection
- * {Object} qobj Main JSON query object
- * {Array} `[orarr]` Array of additional OR query objects (joined with OR predicate).
- * {Object} `[hints]` JSON object with query hints.
- * {Function} cb Callback args: (error, cursor, count)
- `cursor`: Cursor object to traverse records
- qobj `count`: Total number of selected records
-
-__Return__
-
- * If callback is provided returns {undefined}
- * If no callback and `$onlycount` hint is set returns count {Number}.
- * If no callback and no `$onlycount` hint returns cursor {Object}.
-
- --------------------------------------------
-
-<a name="findOne"/>
-### findOne(cname, qobj, orarr, hints, cb)
-Same as #find() but retrieves only one matching JSON object.
-
-Call variations of findOne():
-
- findOne(cname, [cb])
- findOne(cname, qobj, [cb])
- findOne(cname, qobj, hints, [cb])
- findOne(cname, qobj, qobjarr, [cb])
- findOne(cname, qobj, qobjarr, hints, [cb])
-
-__Arguments__
-
- * {String} cname Name of collection
- * {Object} qobj Main JSON query object
- * {Array} `[orarr]` Array of additional OR query objects (joined with OR predicate).
- * {Object} `[hints]` JSON object with query hints.
- * {Function} cb Callback args: (error, obj)
- `obj` Retrieved JSON object or NULL if it is not found.
-
-__Return__
-
- * If callback is provided returns {undefined}
- * If no callback is provided returns found {Object} or {null}
-
------------------------------------
-<a name="findOne"/>
-### update(cname, qobj, orarr, hints, cb)
-Convenient method to execute update queries.
-
- * `$set` Field set operation:
- - {some fields for selection, '$set' : {'field1' : {obj}, ..., 'field1' : {obj}}}
- * `$upsert` Atomic upsert. If matching records are found it will be '$set' operation,
- otherwise new record will be inserted with fields specified by argment object.
- - {.., '$upsert' : {'field1' : val1, 'fieldN' : valN}}
- * `$inc` Increment operation. Only number types are supported.
- - {some fields for selection, '$inc' : {'field1' : number, ..., 'field1' : {number}}
- * `$dropall` In-place record removal operation.
- - {some fields for selection, '$dropall' : true}
- * `$addToSet` | `$addToSetAll` Atomically adds value to the array only if its not in the array already.
- If containing array is missing it will be created.
- - {.., '$addToSet' : {'fpath' : val1, 'fpathN' : valN, ...}}
- * `$pull` | `pullAll` Atomically removes all occurrences of value from field, if field is an array.
- - {.., '$pull' : {'fpath' : val1, 'fpathN' : valN, ...}}
-
-Call variations of update():
-
- update(cname, [cb])
- update(cname, qobj, [cb])
- update(cname, qobj, hints, [cb])
- update(cname, qobj, qobjarr, [cb])
- update(cname, qobj, qobjarr, hints, [cb])
-
-__Arguments__
-
- * {String} cname Name of collection
- * {Object} qobj Update JSON query object
- * {Array} `[orarr]` Array of additional OR query objects (joined with OR predicate).
- * {Object} `[hints]` JSON object with query hints.
- * {Function} cb Callback args: (error, count)
- `count` The number of updated records.
-
-__Return__
-
- * If callback is provided returns {undefined}.
- * If no callback is provided returns {Number} of updated objects.
-
-
------------------------------------
-
-<a name="count"/>
-### count(cname, qobj, orarr, hints, cb)
-Convenient count(*) operation.
-
-Call variations of count():
-
- count(cname, [cb])
- count(cname, qobj, [cb])
- count(cname, qobj, hints, [cb])
- count(cname, qobj, qobjarr, [cb])
- count(cname, qobj, qobjarr, hints, [cb])
-
-__Arguments__
-
- * {String} cname Name of collection
- * {Object} qobj Main JSON query object
- * {Array} `[orarr]` Array of additional OR query objects (joined with OR predicate).
- * {Object} `[hints]` JSON object with query hints.
- * {Function} cb Callback args: (error, count)
- `count`: Number of matching records.
-
-__Return__
-
- * If callback is provided returns {undefined}.
- * If no callback is provided returns {Number} of matched object.
-
------------------------------------
-
-<a name="sync"/>
-### sync(cb)
-Synchronize entire EJDB database with disk.
-
-__Arguments__
-
- * {Function} cb Callback args: (error)
-
------------------------------------
-
-<a name="dropIndexes"/>
-### dropIndexes(cname, path, cb)
-Drop indexes of all types for JSON field path.
-
-__Arguments__
-
- * {String} cname Name of collection
- * {String} path JSON field path
- * {Function} `[cb]` Optional callback function. Callback args: (error)
-
-------------------------------------
-
-<a name="optimizeIndexes"/>
-### optimizeIndexes(cname, path, cb)
-Optimize indexes of all types for JSON field path.
-Performs B+ tree index file optimization.
-
- __Arguments__
-
- * {String} cname Name of collection
- * {String} path JSON field path
- * {Function} `[cb]` Optional callback function. Callback args: (error)
-
------------------------------------
-
-<a name="ensureIndex"/>
-### ensureStringIndex(cname, path, cb)
-### ensureIStringIndex(cname, path, cb)
-### ensureNumberIndex(cname, path, cb)
-### ensureArrayIndex(cname, path, cb)
-
-Ensure index presence of String|Number|Array type for JSON field path.
-`IString` is the special type of String index for case insensitive matching.
-
- __Arguments__
-
- * {String} cname Name of collection
- * {String} path JSON field path
- * {Function} `[cb]` Optional callback function. Callback args: (error)
-
------------------------------------
-
-<a name="rebuildIndex"/>
-### rebuildStringIndex(cname, path, cb)
-### rebuildIStringIndex(cname, path, cb)
-### rebuildNumberIndex(cname, path, cb)
-### rebuildArrayIndex(cname, path, cb)
-
-Rebuild index of String|Number|Array type for JSON field path.
-`IString` is the special type of String index for case insensitive matching.
-
- __Arguments__
-
- * {String} cname Name of collection
- * {String} path JSON field path
- * {Function} `[cb]` Optional callback function. Callback args: (error)
-
------------------------------------
-
-<a name="dropIndex"/>
-### dropStringIndex(cname, path, cb)
-### dropIStringIndex(cname, path, cb)
-### dropNumberIndex(cname, path, cb)
-### dropArrayIndex(cname, path, cb)
-
-Drop index of String|Number|Array type for JSON field path.
-`IString` is the special type of String index for case insensitive matching.
-
- __Arguments__
-
- * {String} cname Name of collection
- * {String} path JSON field path
- * {Function} `[cb]` Optional callback function. Callback args: (error)
-
------------------------------------
-
+**[EJDB NodeJS binding page](https://github.com/Softmotions/ejdb/blob/master/node/README.md)**
EJDB Python binding
==================================
@@ -725,7 +242,7 @@ EJDB C Library
One snippet intro
-----------------------------------
-~~~~~~
+```C
#include <tcejdb/ejdb.h>
static EJDB *jb;
@@ -787,7 +304,7 @@ int main() {
ejdbdel(jb);
return 0;
}
-~~~~~~
+```
You can save this code in `csnippet.c` And build:
@@ -813,11 +330,11 @@ Manual installation
### Build and install
-~~~~~~
+```
cd ./tcejdb
./configure --prefix=<installation prefix> && make && make check
make install
-~~~~~~
+```
* library name: **tcejdb** (with pkgconfig)
* main include header: ```<tcejdb/ejdb.h>```