leerho opened a new pull request, #280:
URL: https://github.com/apache/datasketches-memory/pull/280
# RC1 candidate for the 7.0.0 release.
## With this release the build code has been completely refactored:
* A clean all-Maven build, install and deploy process ( no shell scripts
required ).
* New GitHub Actions Workflows that test this project in matrix of 3 OSs
(Windows, MacOS, Ubuntu) and 3 Java versions (11, 17, 21), as well as workflows
that help in the release process.
* All code jar files, including the test jars, can be successfully run as
jars.
* The Apache release source is a multi-module Maven project
* The release to Maven Central is two jar sets as two new artifacts:
* datasketches-memory-java11
* datasketches-memory-java17_21
* This is not a JPMS module, but the default jars do provide the `Automatic
Module Name` for integration into JPMS projects.
* All documentation has been brought up-to-date.
## Basic Capabilities of DataSketches Memory Project
The objective of this project is to enable efficient creation of on-heap and
off-heap `regions` of memory. This includes:
* **Speed**: Fast Read & Write using Unsafe
* **Types**: All Java primitives plus Java Strings
* **Target**: A contiguous *region* of on-heap or off-heap memory. (Note:
Java FFM later named this *region* a *MemorySegment*)
* **Addressing**: Arbitrary Byte Offset (long) as well as relative
positional offset.
* **Size**: A region of off-heap memory may exceed the standard Java limit
of 2^31-1 bytes.
## The context of these `regions` include:
* Wrapping of Java primitive arrays as a region.
* Wrapping of ByteBuffers (both on and off-heap) as a region.
* Creation and immediate closing of off-heap regions of memory.
* Creation and immediate closing of off-heap memory-mapped regions of a file.
# In addition:
This release fixes several drawbacks of the earlier releases:
* DS-memory release 4.1.0 for Java 17 depends on "Java FFM incubation code"
for off-heap operations and this incubation code is no longer available. This
is now fixed by removing only the file-mapped memory capability mentioned
above, but all other off-heap operations are available.
* DS-memory release 6.0.0 for Java 21 depends on "Java FFM preview code" for
off-heap operations and this preview code is no longer available. This is now
fixed by removing only the file-mapped memory capability mentioned above, but
all other off-heap operations are available.
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