mapdb | MapDB provides concurrent Maps , Sets and Queues | Database library

by jankotek Java Version: mapdb-3.0.9 License: Apache-2.0

X-Ray Key Features Code Snippets Community Discussions(4)Vulnerabilities Install Support

kandi X-RAY | mapdb Summary

mapdb is a Java library typically used in Database applications. mapdb has no bugs, it has no vulnerabilities, it has build file available, it has a Permissive License and it has high support. You can download it from GitHub, Maven.

[Join the chat at

Support

Quality

Security

License

Reuse

Support

mapdb has a highly active ecosystem.

It has 4712 star(s) with 873 fork(s). There are 319 watchers for this library.

It had no major release in the last 6 months.

There are 169 open issues and 732 have been closed. On average issues are closed in 112 days. There are 5 open pull requests and 0 closed requests.

It has a negative sentiment in the developer community.

The latest version of mapdb is mapdb-3.0.9

Quality

mapdb has 0 bugs and 0 code smells.

Security

mapdb has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

mapdb code analysis shows 0 unresolved vulnerabilities.

There are 0 security hotspots that need review.

License

mapdb is licensed under the Apache-2.0 License. This license is Permissive.

Permissive licenses have the least restrictions, and you can use them in most projects.

Reuse

mapdb releases are not available. You will need to build from source code and install.

Deployable package is available in Maven.

Build file is available. You can build the component from source.

Installation instructions are not available. Examples and code snippets are available.

mapdb saves you 9938 person hours of effort in developing the same functionality from scratch.

It has 20243 lines of code, 2041 functions and 135 files.

It has medium code complexity. Code complexity directly impacts maintainability of the code.

Top functions reviewed by kandi - BETA

kandi has reviewed mapdb and discovered the below as its top functions. This is intended to give you an instant insight into mapdb implemented functionality, and help decide if they suit your requirements.

Compacts the index file
Transfers data from one volume to another
Closes the index
Puts a new value into the internal buffer
Return the next io record from the index
Inserts a collection at the specified index
Reload the file
Removes all records from the free table
Adds a collection of entries to the kernel
Creates the index structure
Computes the checksum for the index header
Returns a string representation of this map
Pack an int
Serialize an array of values
Write char array
Deserialize an array of bytes
Compares two arrays
Compare and update a record with expected value
Returns true if any of the specified keys are present in the map
Get all records
Deserialize an Object array
Preallocate record ids
Deserialize char array
Deserialize values from the given input
Returns the number of key - value mappings in this map
Returns a string representation of the statistics

Get all kandi verified functions for this library.

mapdb Key Features

No Key Features are available at this moment for mapdb.

mapdb Examples and Code Snippets

No Code Snippets are available at this moment for mapdb.

Community Discussions

Trending Discussions on mapdb

how BoxStoreBuilder.usePreviousCommit works internally?

Editing array also changes another array

org.mapdb.DBException$SerializationError when storing JSONArray in MapDB using ELSA Serialization

I want to add a property to JSON Object with an array of integers as a value in Java

QUESTION

how BoxStoreBuilder.usePreviousCommit works internally?

Asked 2021-Nov-08 at 15:09

i converted my android app from mapdb to objectbox, i've seen on github a few people reporting database corruption with objectbox and the solution has always been to call usePreviousCommit in case of problems.

since the objectbox core is close source I wanted to know what usePreviousCommit does internally

are there 2 physical copies of the database? and calling usePreviousCommit reverts to the previous copy?
or does it work in a more complex way? (if yes i wanted to know how)

i opened this question because i want more information from objectbox before i continue to use it in production.

...

ANSWER

Answered 2021-Nov-08 at 15:09

The key word is multiversion-concurrency. Think of a B+ tree with copy-on-write. The previous root tree (aka the previous commit) is preserved, so you can use when opening.

Source https://stackoverflow.com/questions/69838505

QUESTION

Editing array also changes another array

Asked 2021-Apr-26 at 19:45

So I'm making a little game in the windows console (just for fun and to test theories) but I am having an issue with the DrawGame() method.

I am creating a new string array (string[] _CompleteMap) with its values being assigned from CurrentMap.MapData (which is also a string array):

string[] _CompleteMap = CurrentMap.MapData;

I am using the CurrentMap.MapData as a blank map, then changing characters within the strings to represent the player and mobs. But when I make a change to _CompleteMap it also seems to be changing the values in CurrentMap.MapData...

I have no idea why this is happening and it is leaving a trail of where the user walked.

Any support would be helpful and I can post the code if required.

...

ANSWER

Answered 2021-Apr-26 at 19:45

Since arrays are reference types, when you do this:

Source https://stackoverflow.com/questions/67270153

QUESTION

org.mapdb.DBException$SerializationError when storing JSONArray in MapDB using ELSA Serialization

Asked 2020-Jul-06 at 03:49

I have a class that store a Long value and JSONArray.

...

ANSWER

Answered 2020-Jul-06 at 03:49

I ended up fixing it by implementing a custom serializer and using it as follows:

Source https://stackoverflow.com/questions/62742844

QUESTION

I want to add a property to JSON Object with an array of integers as a value in Java

Asked 2020-Jan-16 at 08:45

I want to create a JSON object that the value of one of its properties is an array, it should look as follow:

...

ANSWER

Answered 2020-Jan-15 at 16:04

Per the docs on JSONObject you need to use Json.createArrayBuilder():

Source https://stackoverflow.com/questions/59754426

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install mapdb

You can download it from GitHub, Maven.
You can use mapdb like any standard Java library. Please include the the jar files in your classpath. You can also use any IDE and you can run and debug the mapdb component as you would do with any other Java program. Best practice is to use a build tool that supports dependency management such as Maven or Gradle. For Maven installation, please refer maven.apache.org. For Gradle installation, please refer gradle.org .

Support

For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .

Find more information at: