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Sun open sources Java under GPL
It's no surprise that Sun is making its core Java platform freely available; what is somewhat unexpected is the vendor's choice of open source license.
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In all the open sourcing of its software to date, Sun has used its own open source license, Common Development and Distribution License (CDDL).
What Sun is due to announce Monday is the open sourcing of both its Java Platform Standard Edition (Java SE) and its Java Platform Micro Edition (Java ME) under the GNU general public license version 2 (GPLv2).
Popular in the free and open source software (FOSS) community, the GPL which was created in 1989, then revised as GPLv2 in 1991, is used by the Linux operating system, MySQL AB's database and the Samba file-and-print server project.
Sun first committed in May to make Java freely available and since that time company executives have been consulting with Sun partners and developers to determine which license would best meet their needs.
"GPL is the right choice," said Laurie Tolson, Sun's vice president of Java developer products and programs. The move shouldn't be read as an admission that CDDL has failed, she added, although convincing developers to adopt a newer open source license has taken more time than Sun might have hoped.
Compatibility was a key driver for Sun in the decision to use GPL for Java, Tolson said. In particular, the vendor hopes that GNU/Linux distributions such as Debian and Ubuntu will bundle Java into their operating systems and so take the development environment into new markets.
The plan is to offer the open source versions of Java SE and Java ME under GPLv2. But Sun is open to adding another open source license should the vendor not see rapid uptake of Java under GPL, Tolson said. At the same time, Sun will continue to provide commercial versions of its Java technologies for those users seeking paid support.
Sun also committed to providing dual licensing for Project GlassFish, its open source application server initiative based on the Java Platform Enterprise Edition (Java EE). Underway since June 2005, GlassFish was available under CDDL. Come the first quarter of next year, GlassFish will also be licensed under GPLv2 to make it easier for developers to distribute versions of Java SE, Java EE and Java ME together.
The IDG News Service is a Network World affiliate.
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