lmdbjava | Lightning Memory Database for Java : a low latency | Key Value Database library

by lmdbjava Java Version: lmdbjava-0.8.3 License: Apache-2.0

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

kandi X-RAY | lmdbjava Summary

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

Lightning Memory Database (LMDB) for Java: a low latency, transactional, sorted, embedded, key-value store

Support

Quality

Security

License

Reuse

Support

lmdbjava has a low active ecosystem.

It has 726 star(s) with 115 fork(s). There are 41 watchers for this library.

It had no major release in the last 6 months.

There are 6 open issues and 170 have been closed. On average issues are closed in 211 days. There are no pull requests.

It has a neutral sentiment in the developer community.

The latest version of lmdbjava is lmdbjava-0.8.3

Quality

lmdbjava has 0 bugs and 0 code smells.

Security

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

lmdbjava code analysis shows 0 unresolved vulnerabilities.

There are 0 security hotspots that need review.

License

lmdbjava 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

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

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

Top functions reviewed by kandi - BETA

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

Returns an iterator over keys
Execute a Cursor operation
Determines the action to start the iterator
Determine the appropriate response to this iterator operation
Puts the given number of elements into the database
Fetch the mask for all provided flags
Prepares an array for storing data in a multi - byte array
Checks for LMDB result code
Serializes the object
Allocate a direct buffer
Store by cursor
This method serializes the internal data structure
Counts the number of duplicates for the current key
Returns the LMDB library version information
Reads a serialized buffer
Puts data into a direct buffer
Returns a list of DbiFlags associated with this Dbi object
Reserve space for the specified key
Reserves a value in the given key
Start verification of the verifier
Renew a cursor handle
Searches for a field in the class hierarchy
Returns information about this environment
Returns statistics about this database
Verify the validity of the database
Extracts the native library

Get all kandi verified functions for this library.

lmdbjava Key Features

No Key Features are available at this moment for lmdbjava.

lmdbjava Examples and Code Snippets

No Code Snippets are available at this moment for lmdbjava.

Community Discussions

Trending Discussions on lmdbjava

How do I open a LMDB database in Java?

LMDB Java retrieve all values with same key

Using lmdbjava in Clojure

Akka 2.5 Distributed Data on Docker + Alpine Linux

QUESTION

How do I open a LMDB database in Java?

Asked 2019-Nov-19 at 20:27

I am trying to open a LMDB database using its Java API.

This is my Database class:

...

ANSWER

Answered 2019-Nov-19 at 09:26

Most Likely you are missing dependency, or jar file containing jnr.ffi.byref.PointerByReference class is missing from Classpath.

Check: https://javarevisited.blogspot.com/2011/08/classnotfoundexception-in-java-example.html

Depends on whichever tool you are using, add dependency to pom.xml or build.gradle or add it to classpath.

Source https://stackoverflow.com/questions/58927486

QUESTION

LMDB Java retrieve all values with same key

Asked 2018-Jul-23 at 22:15

I want to store multiple values with the same key. I made sure to include the MDB_DUPSORT flag when creating the database. I am also aware this limits the value size but in this specific case this is not a problem.

My problem starts when I want to read the values with the same keys. I searched but could not find a clear answer on how to do this.

So basically: how to retrieve all values with the same key?

I use lmdbjava to read/write from the database.

I tried this but the iterator continues on with the next key and does not stop when the last value is read:

...

ANSWER

Answered 2018-Jul-23 at 22:15

Rather than KeyRange.atLeast which according to the javadoc

starts on the passed key (or the first key immediately after it) and iterate forward until no keys remain

I think you'd want to use KeyRange.closed

Iterate forward between the passed keys, matching on the first keys directly equal to the passed key (or immediately following it in the case of the "start" key, or immediately preceding it in the case of the "stop" key).

Test for it

Source https://stackoverflow.com/questions/51424289

QUESTION

Using lmdbjava in Clojure

Asked 2017-Aug-24 at 04:45

I'm trying to use lmdbjava in Clojure, but I'm struggling.

...

ANSWER

Answered 2017-Aug-24 at 04:45

From the signature of the Env.Builder class:

Source https://stackoverflow.com/questions/45850266

QUESTION

Akka 2.5 Distributed Data on Docker + Alpine Linux

Asked 2017-Apr-21 at 14:53

After upgrading a service that uses Akka + Akka cluster sharding to the newly released Akka (2.5.0), we started encountering issues starting the system in Docker + Alpine Linux. From what I can infer, Akka Cluster sharding is configured to used Akka Distributed Data (which is not experimental anymore as of 2.5.0) and it is using LMDB (which requires GCC + glibc and it is not available in Alpine Linux).

My questions are as follows:

1) Is there any standard alternative supported by Akka instead of LMDB?

2) Is there any way to get LMDB to work in Alpine Linux?

Stack Trace:

...

ANSWER

Answered 2017-Apr-21 at 14:53

Finally managed to solve this problem. Cluster sharding attempts to use durable storage by default (default is LMDB). For cluster sharding without using remember-entities, durable storage is not required.

Hence, the solution to this was to disable durable storage for cluster sharding by adding the following configuration

Source https://stackoverflow.com/questions/43524304

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

Vulnerabilities

No vulnerabilities reported

Install lmdbjava

You can download it from GitHub.
You can use lmdbjava 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 lmdbjava 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 .