|Oracle® Java ME Embedded Reference Platform Release Notes (Qualcomm IoE)
Reference Platform Release Notes (Qualcomm IoE)
The Oracle Java ME Embedded release 8 software for the Qualcomm IoE development platform is a ready-to-run software image for use with a Qualcomm IoE board. The Oracle Java ME Embedded software is an optimized platform stack for small embedded devices, which includes the Connected Limited Device Configuration (CLDC) HotSpot Implementation (Java Virtual Machine) version 8, the Micro Edition Embedded Profile (MEEP) application environment, the Generic Connection Framework (GCF) API, and enhanced support for Java Specification Requests (JSRs).
The following features are supported in the Oracle Java ME Embedded release 8 software:
Full API set
General Connection Framework (GCF) 8
File protocol (file: scheme)
Datagram (datagram: scheme)
TCP/IP client socket (socket: scheme)
TCP/IP server socket (socket: scheme)
Secure client socket (ssl: scheme)
HTTP (http: scheme)
HTTPS (https: scheme)
Communication port (comm: scheme)
Secure datagram (dtls: scheme)
Secure server socket (ssl: scheme)
For more information about the implementation specifics, see Usage Notes.
javax.microedition.pki package and other security-related enhancements
Java ME Embedded Profile (MEEP) 8:
For more information about the level of support for system events and power management, see Usage Notes.
javax.microedition.io (IMC, PushRegistry)
For more information about the MEEP cellular API specifics, see the Usage Notes.
Device I/O APIs, which provide enhanced device controls and improved input/output (I/O) for small embedded devices:
Serial Peripheral Interface (SPI)
Analog-to-Digital Converter (ADC)
Digital-to-Analog Converter (DAC)
Universal Asynchronous Receiver/Transmitter (UART)
Modem Control (AT) command set
For more information about the Device I/O specifics, see Appendix A, "Device I/O Preconfigured List", of the Getting Started Guide for the Referenced Platform (Qualcomm IoE.)
Ongoing support for the following optional packages:
JSR 75 - (FileConnection API only)
JSR 120 - WMA
JSR 172 - Web Services
JSR 177 - Security and Trust Services API (SATSA-CRYPTO package only)
JSR 179 - Location
JSR 280 - XML API for Java ME
Tooling is supported through USB/Serial connection only
Command-line interface (CLI)
Memory monitoring is fully enabled in this release and provides:
Contents of the Java heap
A call context for each object at its creation
CPU profiling is fully enabled in this release and provides:
A way to identify bottlenecks in applications
Data for each method: an execution duration, exact number of calls, and a method context
The Oracle Java ME Embedded software for the Qualcomm IoE embedded platform consists of a binary file that must be downloaded to a board running the Brew MP operating system and a directory structure that must be copied to two directories on the board.
Getting Started Guide for the Reference Platform (Qualcomm IoE) describes how to download the binary file to the board, how to connect to the board from the development host computer, and how to install, run, and debug IMlets on the board.
Note the following important information before running the Oracle Java ME Embedded software on the board:
During any modification of the
MAX_ISOLATES property in the
jwc_properties.ini file, up to 3 isolates can be reserved by the Java runtime.
Modem connection is not supported in this release.
Multicast is not supported in this release.
IPv6 support is not tested in this release.
JSR 179: GPS support has the following limitations:
Assisted GPS providers are supported only in CDMA networks.
Only latitude and longitude values can be retrieved from the received location information.
Device I/O: All devices support only the exclusive mode.
Support for Device I/O APIs does not include the following features:
Pulse width modulation (PWM) peripheral
Memory-mapped I/O (MMIO)
Support for Java ME Embedded Profile 8 APIs does not include the following features:
Note that a network can be lost and appear again at any time (such as WiFi and 3G-specific networks); An IP address can be changed due to routers, DHCP, and networks specifics. IMlets should be written to react to these situations.
JSR 120 WMA has the following specifics:
It is impossible to send large SMS (about 400 characters) messages every 1 second. Sending 40 characters every 10 seconds works fine.
Some SIM cards do not support sending SMS to non-standard ports, such as 1111, 2222, but work fine with standard ports.
You might encounter WiFi authentication issues when using routers with the WPA2-PSK algorithm. You must set the WPA-PSK authentication algorithm manually.
The Qualcomm IoE board supports the following
The Loopback network interface has only one preconfigured system access point named
System_WiFi that is always in the active state.
Access points of the CDMA interface cannot be connected.
It is impossible to disconnect from a Loopback access point.
It is possible to create and delete access points from a Java application, connect to or disconnect from them except for the Loopback access point.
The value of the 3GPP
apnoperator property is always
The value of the
passwordsupplied property is always
true for all network interfaces/access points, where applicable. The reason is that a password is always supplied for a system access point, but may be not used during the connection time. However, the shared code returns the value for this property based on whether or not the password is null.
Getting exceptions such as
IOException or other types that relate specific network- related issues might indicate loss of the network connection. Therefore, applications must try to reconnect to a network access point.
Support for the system events and power management in this release includes the following events:
The value of the event is available through the
EventManager.getCurrent() method and is delivered to the registered event listeners whenever the value changes.
Note the use case: Insert a SIM card in the Qualcomm IoE board, make a call on the card's number, and hand up the call. This sends the value of the event to the registered event listeners.
The value of the battery level is returned by both
When an IoE board is powered by an on-board external battery, the returned value is the battery charge level. See Section 5.3.5, "Controlling the Power Supply", of the Qualcomm IoE Development Platform User Guide for the information about how to properly power up the board.
When an IoE board is powered through a DC jack, the returned value varies within the range of 67 and 69. The value is returned even if an external battery is plugged in because the same ADC call is used to check the battery and DC charging. The charge level of 67-69 means a full charge and is obtained from the hardware pin with no indication of the source (battery or DC charging) that contributed to this pin value.
Whenever the external battery level changes, the new value is delivered to all registered event listeners.
PowerStateEvent.POWER_ALERT including the following alerts (in the case of sending a notification) and values (when the
EventManager.getCurrent() method is called):
PowerStateEvent.POWER_ALERT_BATTERY_NORMAL alert is sometimes sent when the level is less than 5%.
PowerStateEvent.POWER_ALERT_BATTERY_LOW alert is generated when the level is less than 5%.
PowerStateEvent.POWER_ALERT_BATTERY_CRITICAL alert is generated when the level is close to 1%.
The list of supported power states:
PowerStateEvent.POWER_STATE_FULL_POWER (the default)
PowerStateEvent.POWER_STATE_OFF (shuts down only Java applications rather than the whole device)
Switching to unsupported states throws exceptions.
The PowerManager's implementation has the following specifics:
getBatteryLevel() is fully supported. See the PowerStateEvent.BATTERY_LEVEL description.
enableRadio() is not supported and returns
true even when the board is powered by the external battery and there is no DC source.
getEstimatedTimeRemaining() always returns
getPowerState(): The only supported states are
rebootDevice() is fully supported. The type of reboot (hard or soft) is controlled with the
Note the following limitations:
Only 3GPP networks and subscribers are supported. The
CellularNetwork.getType() methods always return
The current implementation supports devices with one SIM/R-UIM card; only one subscriber is available with slot 1.
The cellular network
protocol property cannot be retrieved from the platform. The returned value is always
A subscriber's phone number cannot be retrieved from the platform. The returned value is always
The cellular network cell
cid property cannot be retrieved from the platform. The returned value is always
uuid property cannot be retrieved from the platform. The returned value is always
Subscriber iccid property not supported. The returned value is always
euimid property is not supported.
The Oracle Java ME Embedded release 8 software installation requires an execution model that makes certain networked resources available for device emulator execution. These required resources might include, but are not limited to, a variety of communication capabilities between the product's installed components.
It is important to note that the product's installation and runtime system is fundamentally a developer system that is not specifically designed to guard against malicious attacks from outside intruders. Given this, the product's architecture can present an insecure operating environment to the installation file system itself, and its runtime environment, during execution. For this reason, it is critically important to observe the precautions outlined in the following security guidelines when you install and run the software.
The security-related functionality of a final developed application for release into the field is supported by the available components of the Oracle Java ME Embedded software stack incorporated by the developer into the application. The security precautions required by applications in the field are beyond the scope of these recommendations, but must be observed by the application developer.
To maintain optimum network security, the software package can be installed and run in a closed network operating environment; the software system is not connected directly to the Internet or to a company intranet environment that could introduce unwanted exposure to malicious intrusion. This is the ideal secure operating environment whenever the application under development does not require an Internet connection.
An example of a requirement for an Internet connection is when the system must communicate with a wireless network over the Internet to fully execute the application under development. Whether or not an Internet connection is required depends on the particular Java ME application running in the development environment. For example, some Java ME applications can use an HTTP connection. If the environment is open to network access, you must observe the following precautions to protect valuable resources from malicious intrusion:
Locate the development environment behind a secure firewall that strictly limits unauthorized network access to its file system and services. Limit access privileges to those that are required for development while allowing all the bidirectional local network communications that are necessary for the application's functionality. The firewall configuration must support these requirements to run the software while also addressing them from a security standpoint.
Follow the principle of least privilege by assigning the minimum set of system access permissions required for the installation and execution of the software.
Do not store any sensitive information on the same file system that hosts the installation.
To maintain the maximum level of security, ensure that the operating system patches are up-to-date on host machines in the development environment.
The Oracle Java ME Embedded software distribution bundle contains security certificates that are needed for testing during development of products for final release to customers. Some of these certificates are self-signed security certificates generated by Oracle that are mapped to privileged security domains. IMlets signed by these certificates get high privileges to access restricted APIs; these certificates present a security vulnerability if they are released to end users on a customer's device. You must remove these certificates after final testing of the product is completed, when the product is being prepared for release to end users. You do not need to certificates issued by universally recognized certificate authorities (CAs), because these certificates are used only for signature verification, and they do not present a vulnerability.
The CLI is incorporated in the Development Agent program, which communicates with a device through an unsecured protocol. The Developer Agent is a Java SE application that can be reverse engineered to tamper with or to get information about the communication protocol, which might be used by an untrusted entity to manipulate the device. If you decide to implement the Developer Agent in a product deployment, it is your responsibility to incorporate adequate security measures around the Developer Agent communication channel.
For generic bugs in this release of the Oracle Java ME SDK that might affect the Qualcomm IoE platform, see Oracle Java ME Software Development Kit Release Notes.
The following are known bugs in this release of the Oracle Java ME Embedded software:
The modified Java runtime properties cannot be saved.
After you opened the Device Selector, modified the EmbeddedExternalDevice1 properties, such as
AuthenticationPwd, and then restarted the Qualcomm IoE board, the properties are not saved in the
Installation of a MIDlet whose dependency chain contains different versions of the same library (LIBlet) results in an installation error.
To enable the correct installation of the MIDlet, ensure that only one version of a LIBlet is specified in the MIDlet's dependency chain provided by the
UART.read(ByteBuffer) method does not read the requested number of bytes. The
TriggerLevel properties cannot be set.
The current implementation of DIO ATcmd considers 0x00 as a string termination and thus fails to handle the valid character
$00 from the GSM character set.
get command does not provide a detailed description of the default <hostFileName> location.
pwd command when issued after the
cd command, accumulates the previous
cd calls and writes an incorrect path.
pwd command writes an extra empty line after the
<<pwd, OK line.
pwd command writes the usage information, which should not be in the response.
The CLI does not provide a command to delete a directory.
The Java runtime throws a
java.lang.ClassCastException exception when dealing with a certificate with the SAN field.
jdk.dio.power package is missing in the current implementation.
NIO File: The
getRoot() method does not return a correct root.
The following documentation is included with this release of the Oracle Java ME Embedded software. See
All (this document)
Introduction to running Oracle Java ME Embedded on the Qualcomm IoE reference platform.
Getting Started Guide for the Reference Platform (Qualcomm IoE)
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Oracle Java ME Embedded Reference Platform Release Notes (Qualcomm IoE), Release 8
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