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Release Notes
Version 1.5.5

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# 1 Jinterface Release Notes

This document describes the changes made to the Jinterface application.

### 1.1 Jinterface 1.5.5

#### Fixed Bugs and Malfunctions

- JInterface: improve OtpOutputStream buffer allocation

  Previously, the buffer was increased linearly by 2048 bytes. I now propose to use an exponential increase function (similar to Javas ArrayList, e.g. always at least +50%). This significantly increases performance of e.g. doRPC for large parameters. (Thanks to Nico Kruber)

  Own Id: OTP-9806

### 1.2 Jinterface 1.5.4

#### Fixed Bugs and Malfunctions

- Some malformed distribution messages could cause VM to crash, this is now corrected.

  Own Id: OTP-8993

### 1.3 Jinterface 1.5.3.2

#### Improvements and New Features

- The OtpMbox class did not have a hash() method, which it should have because it overrides equals().

  Own Id: OTP-8854

### 1.4 Jinterface 1.5.3.1

#### Improvements and New Features

- An pom.xml file is now generated. (Thanks to Gabor Liptak.)

  Own Id: OTP-8841

### 1.5 Jinterface 1.5.3

#### Improvements and New Features

- The documentation is now possible to build in an open source environment after a number of bugs are fixed and some features are added in the documentation build process.

  - The arity calculation is updated.

  - The module prefix used in the function names for bif's are removed in the generated links so the links will look like "http://www.erlang.org/doc/man/erlang.html#append_element-2" instead of "http://www.erlang.org/doc/man/erlang.html#erlang:append_element-2".

  - Enhanced the menu positioning in the html documentation when a new page is loaded.

  - A number of corrections in the generation of man pages (thanks to Sergei Golovan)

  - The legal notice is taken from the xml book file so OTP's build process can be used for non OTP applications.

  Own Id: OTP-8343

### 1.6 Jinterface 1.5.2

#### Improvements and New Features

- The documentation is now built with open source tools (xsltproc and fop) that exists on most platforms. One visible change is that the frames are removed.

  Own Id: OTP-8201

### 1.7 Jinterface 1.5.1

#### Fixed Bugs and Malfunctions

- Many Erlang classes, e.g. OtpErlangRef, was missing an implementation of the hashCode() method, making it futile to put them in hash structures such as HashMap. Bug and patch provided by Paul Guyot. We extended the patch to all classes and improved (?) on the hash algorithm.

  Own Id: OTP-7899

#### Improvements and New Features

- jinterface uses the new environment variable ERL_EPMD_PORT the same way that erl, epmd and erl_interface do since R13A.

  Own Id: OTP-7885

### 1.8 Jinterface 1.5

#### Improvements and New Features

- A number of fixes and improvements from the ErlIDE group; Vlad Dumitrescu and Jakob Cederlund: JDK 1.5 is now a minimal requirement for building Jinterface. New method: OtpEpmd.lookupNames. OtpErlangList is now iterable. Non-proper lists are now allowed - you have to test if a list is proper or not. Non-proper lists can also be created. New methods: isProper, getHead, getTail and getNthTail. The get tail methods creates a sublist object that re-uses the original list. OtpErlangPid is now Comparable. Empty atoms can now be constructed, a missing feature pointed out by Sebastien Boisgerault on erlang-questions.

  *** POTENTIAL INCOMPATIBILITY ***

  Own Id: OTP-7832

### 1.9 Jinterface 1.4.2

#### Fixed Bugs and Malfunctions

- A bug when Jinterface did not detect remote node disconnects has been corrected.

  Own Id: OTP-7624

### 1.10 Jinterface 1.4.1

#### Fixed Bugs and Malfunctions

- Jinterface has been fixed to use the loopback interface when connecting to the Erlang Port Mapper Daemon - epmd. This facilitates firewall configuration and saves resources.

  Own Id: OTP-7103

- Jinterface now refuses to connect to another node that does not agree on the other node's name. This has been a problem in that a connection was set up, but not used on a following send, which caused a second erroneous connection attempt to fail since the other (Erlang) node rejects a connection due to name disagreement.

  Problem reported and dissected by Alexander Lamb

  Own Id: OTP-7330

### 1.11 Jinterface 1.4

#### Improvements and New Features

- Jinterface has been updated to handle compressed terms, bitstring, new (IEEE) floats and bignums. This has caused a few incompatibilities.

  com.ericsson.otp.erlang.OtpOutputStream now extends java.io.ByteArrayOutputStream, previously java.lang.Object, and hence the method size() now return the number of bytes in the stream as dictated by the new parent class and not the buffer length as before. The new method length() returns what the old size() did return. The method count() is deprecated as it returns the same as the new size().

  com.ericsson.otp.erlang.OtpErlangLong now can handle larger values than 64-bit. Previously when larger than 64-bit integers were sent to a Jinterface node, it caused an com.ericsson.otp.erlang.OtpDecodeException. Now the integer is accepted, but the return value of longValue() is silently truncated, as opposed to the return value of intValue() that now and previously raises an com.ericsson.otp.erlang.OtpRangeException for unrepresentable values. The new methods isLong() and isULong() can be used to determine if the value fits in a long.

  *** POTENTIAL INCOMPATIBILITY ***

  Own Id: OTP-6809

### 1.12 Jinterface 1.3

#### Fixed Bugs and Malfunctions

- OtpMbox.receive() and OtpMbox.receive(long timeout) can now throw OtpErlangDecodeException if the received message can not be decoded. null is now only returned from OtpMbox.receive(long timeout) if a timeout occurs. OtpMbox.receive() will never return null.

  *** POTENTIAL INCOMPATIBILITY ***

  Own Id: OTP-3932 Aux Id: seq5196

- Strings longer than 65535 bytes were encoded wrong by jinterface.

  Own Id: OTP-4883 Aux Id: OTP-4865

- Misc bugfixes:

  - A node pinging itself does no longer cause the java program to hang.

  - OtpMbox.close() uses exit reason 'normal' (atom) instead of "normal" (string).

  - Added OtpNode.closeMbox(OtpMbox mbox, OtpErlangObject reason).

  - Added OtpMbox.exit(OtpErlangObject reason) and OtpMbox.exit(String reason).

  - Added OtpMbox.exit(OtpErlangPid to, OtpErlangObject reason).

  - OtpMbox.exit(OtpErlangPid to, String reason) is now equivalent to OtpMbox.exit(to, new OtpErlangAtom(reason)).

  - Exit signals from an Erlang node can now contain any erlang term as reason, not only atoms.

  Own Id: OTP-5088

- For java versions 1.3.1 or later, localStatus was not sent to registered status handler when OtpNode.close() was called. This is now corrected.

  Own Id: OTP-5169

#### Improvements and New Features

- Process identifiers and port identifiers have been made more unique. Previously 18 bits were used as id in the internal representation of process and port identifiers. Now 28 bits are used.

  The maximum limit on the number of concurrently existing processes due to the representation of pids has been increased to 268435456 processes. The same is true for ports. This limit will at least on a 32-bit architecture be impossible to reach due to memory shortage.

  NOTE: By default, the ERTS, and the erl_interface, ei, and jinterface libraries are now only guaranteed to be compatible with other Erlang/OTP components from the same release. It is possible to set each component in compatibility mode of an earlier release, though. See the documentation for respective component on how to set it in compatibility mode.

  *** POTENTIAL INCOMPATIBILITY ***

  Own Id: OTP-4968 Aux Id: OTP-4196

### 1.13 Jinterface 1.2.1.2

#### Fixed Bugs and Malfunctions

- Output of Java long was truncated to 32 bits. IDL long long and unsigned long long could not be used in a struct for the Java backend. All unsigned integer types for the Java backend had broken marshalling for large values. These bugs has now been fixed.

  Own Id: OTP-4763 Aux Id: seq8024