v2.2.2 (2014-08-08)

-------------------

* allow storing non-reserved attribute names starting with an underscore

Previous versions of ArangoDB parsed away all attribute names that started with an

underscore (e.g. `_test', '_foo', `_bar`) on all levels of a document (root level

and sub-attribute levels). While this behavior was documented, it was unintuitive and

prevented storing documents inside other documents, e.g.:

{

"_key" : "foo",

"_type" : "mydoc",

"references" : [

{

"_key" : "something",

"_rev" : "...",

"value" : 1

},

{

"_key" : "something else",

"_rev" : "...",

"value" : 2

}

]

}

In the above example, previous versions of ArangoDB removed all attributes and

sub-attributes that started with underscores, meaning the embedded documents would lose

some of their attributes. 2.2.2 should preserve such attributes, and will also allow

storing user-defined attribute names on the top-level even if they start with underscores

(such as `_type` in the above example).

* fix conversion of JavaScript String, Number and Boolean objects to JSON.

Objects created in JavaScript using `new Number(...)`, `new String(...)`, or

`new Boolean(...)` were not converted to JSON correctly.

* fixed a race condition on task registration (i.e. `require("org/arangodb/tasks").register()`)

this race condition led to undefined behavior when a just-created task with no offset and

no period was instantly executed and deleted by the task scheduler, before the `register`

function returned to the caller.

* changed run-tests.sh to execute all suitable tests.

* switch to new version of gyp

* fixed upgrade button

v2.2.1 (2014-07-24)

-------------------

* fixed issue with --check-version: when creating a new database the check failed

* issue #947 Foxx applicationContext missing some properties

* added startup option `--wal.suppress-shape-information`

Setting this option to `true` will reduce memory and disk space usage and require

less CPU time when modifying documents or edges. It should therefore be turned on

for standalone ArangoDB servers. However, for servers that are used as replication

masters, setting this option to `true` will effectively disable the usage of the

write-ahead log for replication, so it should be set to `false` for any replication

master servers.

The default value for this option is `false`.

* added optional `ttl` attribute to specify result cursor expiration for HTTP API method

`POST /_api/cursor`

The `ttl` attribute can be used to prevent cursor results from timing out too early.

* (reported by Christian Neubauer):

The problem was that in Google's V8, signed and unsigned chars are not always declared cleanly.

so we need to force v8 to compile with forced signed chars which is done by the Flag:

-fsigned-char

at least it is enough to follow the instructions of compiling arango on rasperry

and add "CFLAGS='-fsigned-char'" to the make command of V8 and remove the armv7=0

* Fixed a bug with the replication client. In the case of single document

transactions the collection was not write locked.

v2.2.0 (2014-07-10)

-------------------

* The replication methods `logger.start`, `logger.stop` and `logger.properties` are

no-ops in ArangoDB 2.2 as there is no separate replication logger anymore. Data changes

are logged into the write-ahead log in ArangoDB 2.2, and not separately by the

replication logger. The replication logger object is still there in ArangoDB 2.2 to

ensure backwards-compatibility, however, logging cannot be started, stopped or

configured anymore. Using any of these methods will do nothing.

This also affects the following HTTP API methods:

- `PUT /_api/replication/logger-start`

- `PUT /_api/replication/logger-stop`

- `GET /_api/replication/logger-config`

- `PUT /_api/replication/logger-config`

Using any of these methods is discouraged from now on as they will be removed in

future versions of ArangoDB.

* INCOMPATIBLE CHANGE: replication of transactions has changed. Previously, transactions

were logged on a master in one big block and shipped to a slave in one block, too.

Now transactions will be logged and replicated as separate entries, allowing transactions

to be bigger and also ensure replication progress.

This change also affects the behavior of the `stop` method of the replication applier.

If the replication applier is now stopped manually using the `stop` method and later

restarted using the `start` method, any transactions that were unfinished at the

point of stopping will be aborted on a slave, even if they later commit on the master.

In ArangoDB 2.2, stopping the replication applier manually should be avoided unless the

goal is to stop replication permanently or to do a full resync with the master anyway.

If the replication applier still must be stopped, it should be made sure that the

slave has fetched and applied all pending operations from a master, and that no

extra transactions are started on the master before the `stop` command on the slave

is executed.

Replication of transactions in ArangoDB 2.2 might also lock the involved collections on

the slave while a transaction is either committed or aborted on the master and the

change has been replicated to the slave. This change in behavior may be important for

slave servers that are used for read-scaling. In order to avoid long lasting collection

locks on the slave, transactions should be kept small.

The `_replication` system collection is not used anymore in ArangoDB 2.2 and its usage is

discouraged.

* INCOMPATIBLE CHANGE: the figures reported by the `collection.figures` method

now only reflect documents and data contained in the journals and datafiles of

collections. Documents or deletions contained only in the write-ahead log will

not influence collection figures until the write-ahead log garbage collection

kicks in. The figures for a collection might therefore underreport the total

resource usage of a collection.

Additionally, the attributes `lastTick` and `uncollectedLogfileEntries` have been

added to the result of the `figures` operation and the HTTP API method

`PUT /_api/collection/figures`

* added `insert` method as an alias for `save`. Documents can now be inserted into

a collection using either method:

db.test.save({ foo: "bar" });

db.test.insert({ foo: "bar" });

* added support for data-modification AQL queries

* added AQL keywords `INSERT`, `UPDATE`, `REPLACE` and `REMOVE` (and `WITH`) to

support data-modification AQL queries.

Unquoted usage of these keywords for attribute names in AQL queries will likely

fail in ArangoDB 2.2. If any such attribute name needs to be used in a query, it

should be enclosed in backticks to indicate the usage of a literal attribute

name.

For example, the following query will fail in ArangoDB 2.2 with a parse error:

FOR i IN foo RETURN i.remove

and needs to be rewritten like this:

FOR i IN foo RETURN i.`remove`

* disallow storing of JavaScript objects that contain JavaScript native objects

of type `Date`, `Function`, `RegExp` or `External`, e.g.

db.test.save({ foo: /bar/ });

db.test.save({ foo: new Date() });

will now print

Error: <data> cannot be converted into JSON shape: could not shape document

Previously, objects of these types were silently converted into an empty object

(i.e. `{ }`).

To store such objects in a collection, explicitly convert them into strings

like this:

db.test.save({ foo: String(/bar/) });

db.test.save({ foo: String(new Date()) });

* The replication methods `logger.start`, `logger.stop` and `logger.properties` are

no-ops in ArangoDB 2.2 as there is no separate replication logger anymore. Data changes

are logged into the write-ahead log in ArangoDB 2.2, and not separately by the

replication logger. The replication logger object is still there in ArangoDB 2.2 to

ensure backwards-compatibility, however, logging cannot be started, stopped or

configured anymore. Using any of these methods will do nothing.

This also affects the following HTTP API methods:

- `PUT /_api/replication/logger-start`

- `PUT /_api/replication/logger-stop`

- `GET /_api/replication/logger-config`

- `PUT /_api/replication/logger-config`

Using any of these methods is discouraged from now on as they will be removed in

future versions of ArangoDB.

* INCOMPATIBLE CHANGE: replication of transactions has changed. Previously, transactions

were logged on a master in one big block and shipped to a slave in one block, too.

Now transactions will be logged and replicated as separate entries, allowing transactions

to be bigger and also ensure replication progress.

This change also affects the behavior of the `stop` method of the replication applier.

If the replication applier is now stopped manually using the `stop` method and later

restarted using the `start` method, any transactions that were unfinished at the

point of stopping will be aborted on a slave, even if they later commit on the master.

In ArangoDB 2.2, stopping the replication applier manually should be avoided unless the

goal is to stop replication permanently or to do a full resync with the master anyway.

If the replication applier still must be stopped, it should be made sure that the

slave has fetched and applied all pending operations from a master, and that no

extra transactions are started on the master before the `stop` command on the slave

is executed.

Replication of transactions in ArangoDB 2.2 might also lock the involved collections on

the slave while a transaction is either committed or aborted on the master and the

change has been replicated to the slave. This change in behavior may be important for

slave servers that are used for read-scaling. In order to avoid long lasting collection

locks on the slave, transactions should be kept small.

The `_replication` system collection is not used anymore in ArangoDB 2.2 and its usage is

discouraged.

* INCOMPATIBLE CHANGE: the figures reported by the `collection.figures` method

now only reflect documents and data contained in the journals and datafiles of

collections. Documents or deletions contained only in the write-ahead log will

not influence collection figures until the write-ahead log garbage collection

kicks in. The figures for a collection might therefore underreport the total

resource usage of a collection.

Additionally, the attributes `lastTick` and `uncollectedLogfileEntries` have been

added to the result of the `figures` operation and the HTTP API method

`PUT /_api/collection/figures`

* added `insert` method as an alias for `save`. Documents can now be inserted into

a collection using either method:

db.test.save({ foo: "bar" });

db.test.insert({ foo: "bar" });

* added support for data-modification AQL queries

* added AQL keywords `INSERT`, `UPDATE`, `REPLACE` and `REMOVE` (and `WITH`) to

support data-modification AQL queries.

Unquoted usage of these keywords for attribute names in AQL queries will likely

fail in ArangoDB 2.2. If any such attribute name needs to be used in a query, it

should be enclosed in backticks to indicate the usage of a literal attribute

name.

For example, the following query will fail in ArangoDB 2.2 with a parse error:

FOR i IN foo RETURN i.remove

and needs to be rewritten like this:

FOR i IN foo RETURN i.`remove`

* disallow storing of JavaScript objects that contain JavaScript native objects

of type `Date`, `Function`, `RegExp` or `External`, e.g.

db.test.save({ foo: /bar/ });

db.test.save({ foo: new Date() });

will now print

Error: <data> cannot be converted into JSON shape: could not shape document

Previously, objects of these types were silently converted into an empty object

(i.e. `{ }`).

To store such objects in a collection, explicitly convert them into strings

like this:

db.test.save({ foo: String(/bar/) });

db.test.save({ foo: String(new Date()) });

* honor startup option `--server.disable-statistics` when deciding whether or not

to start periodic statistics collection jobs

Previously, the statistics collection jobs were started even if the server was

started with the `--server.disable-statistics` flag being set to `true`

* removed startup option `--random.no-seed`

This option had no effect in previous versions of ArangoDB and was thus removed.

* removed startup option `--database.remove-on-drop`

This option was used for debugging only.

* removed startup option `--database.force-sync-properties`

This option is now superfluous as collection properties are now stored in the

write-ahead log.

* introduced write-ahead log

All write operations in an ArangoDB server instance are automatically logged

to the server's write-ahead log. The write-ahead log is a set of append-only

logfiles, and it is used in case of a crash recovery and for replication.

Data from the write-ahead log will eventually be moved into the journals or

datafiles of collections, allowing the server to remove older write-ahead log

logfiles. Figures of collections will be updated when data are moved from the

write-ahead log into the journals or datafiles of collections.

Cross-collection transactions in ArangoDB should benefit considerably by this

change, as less writes than in previous versions are required to ensure the data

of multiple collections are atomcially and durably committed. All data-modifying

operations inside transactions (insert, update, remove) will write their

operations into the write-ahead log directly, making transactions with multiple

operations also require less physical memory than in previous versions of ArangoDB,

that required all transaction data to fit into RAM.

The `_trx` system collection is not used anymore in ArangoDB 2.2 and its usage is

discouraged.

The data in the write-ahead log can also be used in the replication context.

The `_replication` collection that was used in previous versions of ArangoDB to

store all changes on the server is not used anymore in ArangoDB 2.2. Instead,

slaves can read from a master's write-ahead log to get informed about most

recent changes. This removes the need to store data-modifying operations in

both the actual place and the `_replication` collection.

* removed startup option `--server.disable-replication-logger`

This option is superfluous in ArangoDB 2.2. There is no dedicated replication

logger in ArangoDB 2.2. There is now always the write-ahead log, and it is also

used as the server's replication log. Specifying the startup option

`--server.disable-replication-logger` will do nothing in ArangoDB 2.2, but the

option should not be used anymore as it might be removed in a future version.

* changed behavior of replication logger

There is no dedicated replication logger in ArangoDB 2.2 as there is the

write-ahead log now. The existing APIs for starting and stopping the replication

logger still exist in ArangoDB 2.2 for downwards-compatibility, but calling

the start or stop operations are no-ops in ArangoDB 2.2. When querying the

replication logger status via the API, the server will always report that the

replication logger is running. Configuring the replication logger is a no-op

in ArangoDB 2.2, too. Changing the replication logger configuration has no

effect. Instead, the write-ahead log configuration can be changed.

* removed MRuby integration for arangod

ArangoDB had an experimental MRuby integration in some of the publish builds.

This wasn't continuously developed, and so it has been removed in ArangoDB 2.2.

This change has led to the following startup options being superfluous:

- `--ruby.gc-interval`

- `--ruby.action-directory`

- `--ruby.modules-path`

- `--ruby.startup-directory`

Specifying these startup options will do nothing in ArangoDB 2.2, but the

options should be avoided from now on as they might be removed in future versions.

* reclaim index memory when last document in collection is deleted

Previously, deleting documents from a collection did not lead to index sizes being

reduced. Instead, the already allocated index memory was re-used when a collection

was refilled.

Now, index memory for primary indexes and hash indexes is reclaimed instantly when

the last document from a collection is removed.

* inlined and optimized functions in hash indexes

* added AQL TRANSLATE function

This function can be used to perform lookups from static lists, e.g.

LET countryNames = { US: "United States", UK: "United Kingdom", FR: "France" }

RETURN TRANSLATE("FR", countryNames)

* fixed datafile debugger

* fixed check-version for empty directory

* moved try/catch block to the top of routing chain

* added mountedApp function for foxx-manager

* fixed issue #883: arango 2.1 - when starting multi-machine cluster, UI web

does not change to cluster overview

* fixed dfdb: should not start any other V8 threads

* cleanup of version-check, added module org/arangodb/database-version,

added --check-version option

* fixed issue #881: [2.1.0] Bombarded (every 10 sec or so) with

"WARNING format string is corrupt" when in non-system DB Dashboard

* specialized primary index implementation to allow faster hash table

rebuilding and reduce lookups in datafiles for the actual value of `_key`.

* issue #862: added `--overwrite` option to arangoimp

* removed number of property lookups for documents during AQL queries that

access documents

* prevent buffering of long print results in arangosh's and arangod's print

command

this change will emit buffered intermediate print results and discard the

output buffer to quickly deliver print results to the user, and to prevent

constructing very large buffers for large results

* removed sorting of attribute names for use in a collection's shaper

sorting attribute names was done on document insert to keep attributes

of a collection in sorted order for faster comparisons. The sort order

of attributes was only used in one particular and unlikely case, so it

was removed. Collections with many different attribute names should

benefit from this change by faster inserts and slightly less memory usage.

* fixed a bug in arangodump which got the collection name in _from and _to

attributes of edges wrong (all were "_unknown")

* fixed a bug in arangorestore which did not recognise wrong _from and _to

attributes of edges

* improved error detection and reporting in arangorestore

v2.1.1 (2014-06-06)

-------------------

* fixed dfdb: should not start any other V8 threads

* signature for collection functions was modified

The basic change was the substitution of the input parameter of the

function by an generic options object which can contain multiple

option parameter of the function.

Following functions were modified

remove

removeBySample

replace

replaceBySample

update

updateBySample

Old signature is yet supported but it will be removed in future versions

v2.1.0 (2014-05-29)

-------------------

* implemented upgrade procedure for clusters

* fixed communication issue with agency which prevented reconnect

after an agent failure

* fixed cluster dashboard in the case that one but not all servers

in the cluster are down

* fixed a bug with coordinators creating local database objects

in the wrong order (_system needs to be done first)

* improved cluster dashboard

v2.1.0-rc2 (2014-05-25)

-----------------------

* fixed issue #864: Inconsistent behavior of AQL REVERSE(list) function

v2.1.0-rc1 (XXXX-XX-XX)

-----------------------

* added server-side periodic task management functions:

- require("org/arangodb/tasks").register(): registers a periodic task

- require("org/arangodb/tasks").unregister(): unregisters and removes a

periodic task

- require("org/arangodb/tasks").get(): retrieves a specific tasks or all

existing tasks

the previous undocumented function `internal.definePeriodic` is now

deprecated and will be removed in a future release.

* decrease the size of some seldomly used system collections on creation.

This will make these collections use less disk space and mapped memory.

* added AQL date functions

* added AQL FLATTEN() list function

* added index memory statistics to `db.<collection>.figures()` function

The `figures` function will now return a sub-document `indexes`, which lists

the number of indexes in the `count` sub-attribute, and the total memory

usage of the indexes in bytes in the `size` sub-attribute.

* added AQL CURRENT_DATABASE() function

This function returns the current database's name.

* added AQL CURRENT_USER() function

This function returns the current user from an AQL query. The current user is the

username that was specified in the `Authorization` HTTP header of the request. If

authentication is turned off or the query was executed outside a request context,

the function will return `null`.

* fixed issue #796: Searching with newline chars broken?

fixed slightly different handling of backslash escape characters in a few

AQL functions. Now handling of escape sequences should be consistent, and

searching for newline characters should work the same everywhere

* added OpenSSL version check for configure

It will report all OpenSSL versions < 1.0.1g as being too old.

`configure` will only complain about an outdated OpenSSL version but not stop.

* require C++ compiler support (requires g++ 4.8, clang++ 3.4 or Visual Studio 13)

* less string copying returning JSONified documents from ArangoDB, e.g. via

HTTP GET `/_api/document/<collection>/<document>`

* issue #798: Lower case http headers from arango

This change allows returning capitalized HTTP headers, e.g.

`Content-Length` instead of `content-length`.

The HTTP spec says that headers are case-insensitive, but

in fact several clients rely on a specific case in response

headers.

This change will capitalize HTTP headers if the `X-Arango-Version`

request header is sent by the client and contains a value of at

least `20100` (for version 2.1). The default value for the

compatibility can also be set at server start, using the

`--server.default-api-compatibility` option.

* simplified usage of `db._createStatement()`

Previously, the function could not be called with a query string parameter as

follows:

db._createStatement(queryString);

Calling it as above resulted in an error because the function expected an

object as its parameter. From now on, it's possible to call the function with

just the query string.

* make ArangoDB not send back a `WWW-Authenticate` header to a client in case the

client sends the `X-Omit-WWW-Authenticate` HTTP header.

This is done to prevent browsers from showing their built-in HTTP authentication

dialog for AJAX requests that require authentication.

ArangoDB will still return an HTTP 401 (Unauthorized) if the request doesn't

contain valid credentials, but it will omit the `WWW-Authenticate` header,

allowing clients to bypass the browser's authentication dialog.

* added REST API method HTTP GET `/_api/job/job-id` to query the status of an

async job without potentially fetching it from the list of done jobs

* fixed non-intuitive behaviour in jobs API: previously, querying the status

of an async job via the API HTTP PUT `/_api/job/job-id` removed a currently

executing async job from the list of queryable jobs on the server.

Now, when querying the result of an async job that is still executing,

the job is kept in the list of queryable jobs so its result can be fetched

by a subsequent request.

* use a new data structure for the edge index of an edge collection. This

improves the performance for the creation of the edge index and in

particular speeds up removal of edges in graphs. Note however that

this change might change the order in which edges starting at

or ending in a vertex are returned. However, this order was never

guaranteed anyway and it is not sensible to guarantee any particular

order.

* provide a size hint to edge and hash indexes when initially filling them

this will lead to less re-allocations when populating these indexes

this may speed up building indexes when opening an existing collection

* don't requeue identical context methods in V8 threads in case a method is

already registered

* removed arangod command line option `--database.remove-on-compacted`

* export the sort attribute for graph traversals to the HTTP interface

* add support for arangodump/arangorestore for clusters

v2.0.8 (XXXX-XX-XX)

-------------------

* fixed too-busy iteration over skiplists

Even when a skiplist query was restricted by a limit clause, the skiplist

index was queried without the limit. this led to slower-than-necessary

execution times.

* fixed timeout overflows on 32 bit systems

this bug has led to problems when select was called with a high timeout

value (2000+ seconds) on 32bit systems that don't have a forgiving select

implementation. when the call was made on these systems, select failed

so no data would be read or sent over the connection

this might have affected some cluster-internal operations.

* fixed ETCD issues on 32 bit systems

ETCD was non-functional on 32 bit systems at all. The first call to the

watch API crashed it. This was because atomic operations worked on data

structures that were not properly aligned on 32 bit systems.

* fixed issue #848: db.someEdgeCollection.inEdge does not return correct

value when called the 2nd time after a .save to the edge collection

v2.0.7 (2014-05-05)

-------------------

* issue #839: Foxx Manager missing "unfetch"

* fixed a race condition at startup

this fixes undefined behavior in case the logger was involved directly at

startup, before the logger initialization code was called. This should have

occurred only for code that was executed before the invocation of main(),

e.g. during ctor calls of statically defined objects.

v2.0.6 (2014-04-22)

-------------------

* fixed issue #835: arangosh doesn't show correct database name

v2.0.5 (2014-04-21)

-------------------

* Fixed a caching problem in IE JS Shell

* added cancelation for async jobs

* upgraded to new gyp for V8

* new Windows installer

v2.0.4 (2014-04-14)

-------------------

* fixed cluster authentication front-end issues for Firefox and IE, there are

still problems with Chrome

v2.0.3 (2014-04-14)

-------------------

* fixed AQL optimizer bug

* fixed front-end issues

* added password change dialog

v2.0.2 (2014-04-06)

-------------------

* during cluster startup, do not log (somewhat expected) connection errors with

log level error, but with log level info

* fixed dashboard modals

* fixed connection check for cluster planning front end: firefox does

not support async:false

* document how to persist a cluster plan in order to relaunch an existing

cluster later

v2.0.1 (2014-03-31)

-------------------

* make ArangoDB not send back a `WWW-Authenticate` header to a client in case the

client sends the `X-Omit-WWW-Authenticate` HTTP header.

This is done to prevent browsers from showing their built-in HTTP authentication

dialog for AJAX requests that require authentication.

ArangoDB will still return an HTTP 401 (Unauthorized) if the request doesn't

contain valid credentials, but it will omit the `WWW-Authenticate` header,

allowing clients to bypass the browser's authentication dialog.

* fixed isses in arango-dfdb:

the dfdb was not able to unload certain system collections, so these couldn't be

inspected with the dfdb sometimes. Additionally, it did not truncate corrupt

markers from datafiles under some circumstances

* added `changePassword` attribute for users

* fixed non-working "save" button in collection edit view of web interface

clicking the save button did nothing. one had to press enter in one of the input

fields to send modified form data

* fixed V8 compile error on MacOS X

* prevent `body length: -9223372036854775808` being logged in development mode for

some Foxx HTTP responses

* fixed several bugs in web interface dashboard

* fixed issue #783: coffee script not working in manifest file

* fixed issue #783: coffee script not working in manifest file

* fixed issue #781: Cant save current query from AQL editor ui

* bumped version in `X-Arango-Version` compatibility header sent by arangosh and other

client tools from `1.5` to `2.0`.

* fixed startup options for arango-dfdb, added details option for arango-dfdb

* fixed display of missing error messages and codes in arangosh

* when creating a collection via the web interface, the collection type was always

"document", regardless of the user's choice

v2.0.0 (2014-03-10)

-------------------

* first 2.0 release

v2.0.0-rc2 (2014-03-07)

-----------------------

* fixed cluster authorization

v2.0.0-rc1 (2014-02-28)

-----------------------

* added sharding :-)

* added collection._dbName attribute to query the name of the database from a collection

more detailed documentation on the sharding and cluster features can be found in the user

manual, section **Sharding**

* INCOMPATIBLE CHANGE: using complex values in AQL filter conditions with operators other

than equality (e.g. >=, >, <=, <) will disable usage of skiplist indexes for filter

evaluation.

For example, the following queries will be affected by change:

FOR doc IN docs FILTER doc.value < { foo: "bar" } RETURN doc

FOR doc IN docs FILTER doc.value >= [ 1, 2, 3 ] RETURN doc

The following queries will not be affected by the change:

FOR doc IN docs FILTER doc.value == 1 RETURN doc

FOR doc IN docs FILTER doc.value == "foo" RETURN doc

FOR doc IN docs FILTER doc.value == [ 1, 2, 3 ] RETURN doc

FOR doc IN docs FILTER doc.value == { foo: "bar" } RETURN doc

* INCOMPATIBLE CHANGE: removed undocumented method `collection.saveOrReplace`

this feature was never advertised nor documented nor tested.

* INCOMPATIBLE CHANGE: removed undocumented REST API method `/_api/simple/BY-EXAMPLE-HASH`

this feature was never advertised nor documented nor tested.

* added explicit startup parameter `--server.reuse-address`

This flag can be used to control whether sockets should be acquired with the SO_REUSEADDR

flag.

Regardless of this setting, sockets on Windows are always acquired using the

SO_EXCLUSIVEADDRUSE flag.

* removed undocumented REST API method GET `/_admin/database-name`

* added user validation API at POST `/_api/user/<username>`

* slightly improved users management API in `/_api/user`:

Previously, when creating a new user via HTTP POST, the username needed to be

passed in an attribute `username`. When users were returned via this API,

the usernames were returned in an attribute named `user`. This was slightly

confusing and was changed in 2.0 as follows:

- when adding a user via HTTP POST, the username can be specified in an attribute

`user`. If this attribute is not used, the API will look into the attribute `username`

as before and use that value.

- when users are returned via HTTP GET, the usernames are still returned in an

attribute `user`.

This change should be fully downwards-compatible with the previous version of the API.

* added AQL SLICE function to extract slices from lists

* made module loader more node compatible

* the startup option `--javascript.package-path` for arangosh is now deprecated and does

nothing. Using it will not cause an error, but the option is ignored.

* added coffee script support

* Several UI improvements.

* Exchanged icons in the graphviewer toolbar

* always start networking and HTTP listeners when starting the server (even in

console mode)

* allow vertex and edge filtering with user-defined functions in TRAVERSAL,

TRAVERSAL_TREE and SHORTEST_PATH AQL functions:

// using user-defined AQL functions for edge and vertex filtering

RETURN TRAVERSAL(friends, friendrelations, "friends/john", "outbound", {

followEdges: "myfunctions::checkedge",

filterVertices: "myfunctions::checkvertex"

})

// using the following custom filter functions

var aqlfunctions = require("org/arangodb/aql/functions");

aqlfunctions.register("myfunctions::checkedge", function (config, vertex, edge, path) {

return (edge.type !== 'dislikes'); // don't follow these edges

}, false);

aqlfunctions.register("myfunctions::checkvertex", function (config, vertex, path) {

if (vertex.isDeleted || ! vertex.isActive) {

return [ "prune", "exclude" ]; // exclude these and don't follow them

}

return [ ]; // include everything else

}, false);

* fail if invalid `strategy`, `order` or `itemOrder` attribute values

are passed to the AQL TRAVERSAL function. Omitting these attributes

is not considered an error, but specifying an invalid value for any

of these attributes will make an AQL query fail.

* issue #751: Create database through API should return HTTP status code 201

By default, the server now returns HTTP 201 (created) when creating a new

database successfully. To keep compatibility with older ArangoDB versions, the

startup parameter `--server.default-api-compatibility` can be set to a value

of `10400` to indicate API compatibility with ArangoDB 1.4. The compatibility

can also be enforced by setting the `X-Arango-Version` HTTP header in a

client request to this API on a per-request basis.

* allow direct access from the `db` object to collections whose names start

with an underscore (e.g. db._users).

Previously, access to such collections via the `db` object was possible from

arangosh, but not from arangod (and thus Foxx and actions). The only way

to access such collections from these places was via the `db._collection(<name>)`

workaround.

* allow `\n` (as well as `\r\n`) as line terminator in batch requests sent to

`/_api/batch` HTTP API.

* use `--data-binary` instead of `--data` parameter in generated cURL examples

* issue #703: Also show path of logfile for fm.config()

* issue #675: Dropping a collection used in "graph" module breaks the graph

* added "static" Graph.drop() method for graphs API

* fixed issue #695: arangosh server.password error

* use pretty-printing in `--console` mode by default

* simplified ArangoDB startup options

Some startup options are now superfluous or their usage is simplified. The

following options have been changed:

* `--javascript.modules-path`: this option has been removed. The modules paths

are determined by arangod and arangosh automatically based on the value of

`--javascript.startup-directory`.

If the option is set on startup, it is ignored so startup will not abort with

an error `unrecognized option`.

* `--javascript.action-directory`: this option has been removed. The actions

directory is determined by arangod automatically based on the value of

`--javascript.startup-directory`.

If the option is set on startup, it is ignored so startup will not abort with

an error `unrecognized option`.

* `--javascript.package-path`: this option is still available but it is not

required anymore to set the standard package paths (e.g. `js/npm`). arangod

will automatically use this standard package path regardless of whether it

was specified via the options.

It is possible to use this option to add additional package paths to the

standard value.

Configuration files included with arangod are adjusted accordingly.

* layout of the graphs tab adapted to better fit with the other tabs

* database selection is moved to the bottom right corner of the web interface

* removed priority queue index type

this feature was never advertised nor documented nor tested.

* display internal attributes in document source view of web interface

* removed separate shape collections

When upgrading to ArangoDB 2.0, existing collections will be converted to include

shapes and attribute markers in the datafiles instead of using separate files for

shapes.

When a collection is converted, existing shapes from the SHAPES directory will

be written to a new datafile in the collection directory, and the SHAPES directory

will be removed afterwards.

This saves up to 2 MB of memory and disk space for each collection

(savings are higher, the less different shapes there are in a collection).

Additionally, one less file descriptor per opened collection will be used.

When creating a new collection, the amount of sync calls may be reduced. The same

may be true for documents with yet-unknown shapes. This may help performance

in these cases.

* added AQL functions `NTH` and `POSITION`

* added signal handler for arangosh to save last command in more cases

* added extra prompt placeholders for arangosh:

- `%e`: current endpoint

- `%u`: current user

* added arangosh option `--javascript.gc-interval` to control amount of

garbage collection performed by arangosh

* fixed issue #651: Allow addEdge() to take vertex ids in the JS library

* removed command-line option `--log.format`

In previous versions, this option did not have an effect for most log messages, so

it got removed.

* removed C++ logger implementation

Logging inside ArangoDB is now done using the LOG_XXX() macros. The LOGGER_XXX()

macros are gone.

* added collection status "loading"

v1.4.16 (XXXX-XX-XX)

--------------------

* fixed too eager datafile deletion

this issue could have caused a crash when the compaction had marked datafiles as obsolete

and they were removed while "old" temporary query results still pointed to the old datafile

positions

* fixed issue #826: Replication fails when a collection's configuration changes

v1.4.15 (2014-04-19)

--------------------

* bugfix for AQL query optimiser

the following type of query was too eagerly optimised, leading to errors in code-generation:

LET a = (FOR i IN [] RETURN i) LET b = (FOR i IN [] RETURN i) RETURN 1

the problem occurred when both lists in the subqueries were empty. In this case invalid code

was generated and the query couldn't be executed.

v1.4.14 (2014-04-05)

--------------------

* fixed race conditions during shape / attribute insertion

A race condition could have led to spurios `cannot find attribute #xx` or

`cannot find shape #xx` (where xx is a number) warning messages being logged

by the server. This happened when a new attribute was inserted and at the same

time was queried by another thread.