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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html>
<head>
    <title>Target Communication Framework Services - Breakpoints</title>
</head>

<body lang='EN-US'>
  
<h1>Target Communication Framework Services - Breakpoints</h1>
 
<ul>
    <li><a href='#Cmds'>Commands</a>
    <ul>
        <li><a href='#CmdSet'>Set</a>
        <li><a href='#CmdAdd'>Add</a>
        <li><a href='#CmdChange'>Change</a>
        <li><a href='#CmdEnable'>Enable</a>
        <li><a href='#CmdDisable'>Disable</a>
        <li><a href='#CmdRemove'>Remove</a>
        <li><a href='#CmdGetIDs'>Get IDs</a>
        <li><a href='#CmdGetProperties'>Get Properties</a>
        <li><a href='#CmdGetStatus'>Get Status</a>
        <li><a href='#CmdGetCapabilities'>Get Capabilities</a>
    </ul>
    <li><a href='#Events'>Events</a>
    <li><a href='#API'>API</a>
</ul>

<h1>Breakpoints Service</h1>

<p>Breakpoint is represented by unique identifier and set of properties.
Breakpoint identifier (String id) needs to be unique across all hosts and targets</p>
 
<p>Breakpoint properties is extendable collection of named attributes,
which define breakpoint location and behavior. The service defines some common
attribute names, host tools and target agents may support additional attributes.</p>

<p>For each breakpoint a target agent maintains another extendable collection of named attributes:
breakpoint status. While breakpoint properties are persistent and represent user input,
breakpoint status reflects dynamic target agent reports about breakpoint current state,
like actual addresses where breakpoint is planted or planting errors.</p>

<p>Breakpoints are associated with communication channel and traget agent must remove them
when the channel is closed. Target agent should maintain separate breakpoint table
for each communication channel. It is allowed to set same breakpoint (same ID) through multiple
channels, target agent should treat it as single breakpoint with maltiple references. Such breakpoint
is removed when all refering channels are closed.</p>

<p>The service uses standard format for error reports,
see <a href='TCF Services.html#ErrorFormat'>Error Report Format</a>.</p>
 
<h2><a name='Cmds'>Commands</a></h2>

<h3><a name='CmdSet'>Set</a></h3>

<pre><b><font face="Courier New" size=2 color=#333399>
C  <i>&lt;token&gt;</i>  Breakpoints  set  <i>&lt;array of breakpoints&gt;</i> 

<i>&lt;array of breakpoints&gt;</i>
    <font face=Wingdings></font> null
    <font face=Wingdings></font> [ ]
    <font face=Wingdings></font> [ <i>&lt;breakpoints list&gt;</i> ]

<i>&lt;breakpoints list&gt;</i>
    <font face=Wingdings></font> <i>&lt;breakpoint data&gt;</i>
    <font face=Wingdings></font> <i>&lt;breakpoint data&gt;</i> , <i>&lt;breakpoint data&gt;</i>

<i>&lt;breakpoint data&gt;</i>
    <font face=Wingdings></font> <i>&lt;object&gt;</i>
</font></b></pre>

<p> The command downloads breakpoints data to a target agent.
The command is intended to be used only to initialize target breakpoints table 
when communication channel is open. After that, host should 
notify target about (incremental) changes in breakpoint data by sending
Add, Change and Remove commands.<p>

<p>Breakpoint data consists of a list of breakpoint properties. All properties are optional, except ID.
Tools and targets can define additional properties. Predefined properties are:</p>
<ul>
    <li><code><b><font face="Courier New" size=2 color=#333399>"ID" : <i>&lt;string&gt;</i></font></b></code>
    - breakpoint ID
    <li><code><b><font face="Courier New" size=2 color=#333399>"Enabled" : <i>&lt;boolean&gt;</i></font></b></code>
    - if true breakpoint is enabled
    <li><code><b><font face="Courier New" size=2 color=#333399>"Address" : <i>&lt;string&gt;</i></font></b></code>
    - if preset, defines address of the breakpoint. Address is an expression that evaluates to breakpoint memory address.
    Alternatively, breakpoint location can be given as File/Line/Column.
    <li><code><b><font face="Courier New" size=2 color=#333399>"Condition" : <i>&lt;string&gt;</i></font></b></code>
    - a conditional expression that is evaluted every time execution hits the breakpoint. If condition is evaluated to false,
    the breakpoint is skipped and execution is resumed without sending notifications to a host.
    <li><code><b><font face="Courier New" size=2 color=#333399>"File" : <i>&lt;string&gt;</i></font></b></code>
    - source code file name of breakpoint location.
    <li><code><b><font face="Courier New" size=2 color=#333399>"Line" : <i>&lt;int&gt;</i></font></b></code>
    - source code line number of breakpoint location.
    <li><code><b><font face="Courier New" size=2 color=#333399>"Column" : <i>&lt;int&gt;</i></font></b></code>
    - source code column number of breakpoint location.
</ul>

<p>Reply:</p>

<pre><b><font face="Courier New" size=2 color=#333399>
R  <i>&lt;token&gt;</i>  <i>&lt;error report&gt;</i> 
</font></b></pre>

<h3><a name='CmdAdd'>Add</a></h3>

<pre><b><font face="Courier New" size=2 color=#333399>
C  <i>&lt;token&gt;</i>  Breakpoints  add  <i>&lt;breakpoint data&gt;</i> 
</font></b></pre>

<p>The command adds breakpoint to target agent breakpoint table. Host should send this command when user creates new breakpoint</p>

<p>Reply:</p>

<pre><b><font face="Courier New" size=2 color=#333399>
R  <i>&lt;token&gt;</i>  <i>&lt;error report&gt;</i> 
</font></b></pre>

<h3><a name='CmdChange'>Change</a></h3>

<pre><b><font face="Courier New" size=2 color=#333399>
C  <i>&lt;token&gt;</i>  Breakpoints  change  <i>&lt;breakpoint data&gt;</i> 
</font></b></pre>

<p>The command updates breakpoint data in target agent breakpoint table. Host should send this command when user modifies a breakpoint</p>

<p>Reply:</p>

<pre><b><font face="Courier New" size=2 color=#333399>
R  <i>&lt;token&gt;</i>  <i>&lt;error report&gt;</i> 
</font></b></pre>

<h3><a name='CmdEnable'>Enable</a></h3>

<pre><b><font face="Courier New" size=2 color=#333399>
C  <i>&lt;token&gt;</i>  Breakpoints  enable  <i>&lt;array of breakpoint IDs&gt;</i> 

<i>&lt;array of breakpoint IDs&gt;</i>
    <font face=Wingdings></font> null
    <font face=Wingdings></font> [ ]
    <font face=Wingdings></font> [ <i>&lt;breakpoint IDs list&gt;</i> ]

<i>&lt;breakpoint IDs list&gt;</i>
    <font face=Wingdings></font> <i>&lt;breakpoint ID&gt;</i>
    <font face=Wingdings></font> <i>&lt;breakpoint ID&gt;</i> , <i>&lt;breakpoint ID&gt;</i>

<i>&lt;breakpoint ID&gt;</i>
    <font face=Wingdings></font> <i>&lt;string&gt;</i>
</font></b></pre>

<p>The command enables a list of breakpoints - sets brekpoint property "Enabled" to true.</p>

<p>Reply:</p>

<pre><b><font face="Courier New" size=2 color=#333399>
R  <i>&lt;token&gt;</i>  <i>&lt;error report&gt;</i> 
</font></b></pre>

<h3><a name='CmdDisable'>Disable</a></h3>

<pre><b><font face="Courier New" size=2 color=#333399>
C  <i>&lt;token&gt;</i>  Breakpoints  disable  <i>&lt;array of breakpoint IDs&gt;</i> 
</font></b></pre>

<p>The command disables a list of breakpoints - sets brekpoint property "Enabled" to false.</p>

<p>Reply:</p>

<pre><b><font face="Courier New" size=2 color=#333399>
R  <i>&lt;token&gt;</i>  <i>&lt;error report&gt;</i> 
</font></b></pre>

<h3><a name='CmdRemove'>Remove</a></h3>

<pre><b><font face="Courier New" size=2 color=#333399>
C  <i>&lt;token&gt;</i>  Breakpoints  remove  <i>&lt;array of breakpoint IDs&gt;</i> 
</font></b></pre>

<p>The command removes a list of breakpoints. Host should send this command when user deletes breakpoints.</p>

<p>Reply:</p>

<pre><b><font face="Courier New" size=2 color=#333399>
R  <i>&lt;token&gt;</i>  <i>&lt;error report&gt;</i> 
</font></b></pre>

<h3><a name='CmdGetIDs'>Get IDs</a></h3>

<pre><b><font face="Courier New" size=2 color=#333399>
C  <i>&lt;token&gt;</i>  Breakpoints  getIDs 
</font></b></pre>

<p>The command uploads IDs of breakpoints known to target agent. Only breakpoints what are set through
this communication channel are reported. Target agent should maintain separate breakpoint table
for each communication channel.</p>

<p>Reply:</p>

<pre><b><font face="Courier New" size=2 color=#333399>
R  <i>&lt;token&gt;</i>  <i>&lt;error report&gt;</i>  <i>&lt;array of breakpoint IDs&gt;</i> 
</font></b></pre>

<h3><a name='CmdGetProperties'>Get Properties</a></h3>

<pre><b><font face="Courier New" size=2 color=#333399>
C  <i>&lt;token&gt;</i>  Breakpoints  getProperties  <i>&lt;string: breakpoint ID&gt;</i> 
</font></b></pre>

<p>The command uploads properties of given breakpoint from target agent breakpoint table.</p>

<p>Reply:</p>

<pre><b><font face="Courier New" size=2 color=#333399>
R  <i>&lt;token&gt;</i>  <i>&lt;error report&gt;</i>  <i>&lt;;breakpoint data&gt;</i> 
</font></b></pre>

<h3><a name='CmdGetStatus'>Get Status</a></h3>

<pre><b><font face="Courier New" size=2 color=#333399>
C  <i>&lt;token&gt;</i>  Breakpoints  getStatus  <i>&lt;string: breakpoint ID&gt;</i> 
</font></b></pre>

<p>The command uploads status of given breakpoint from target agent.</p>

<p>Reply:</p>

<pre><b><font face="Courier New" size=2 color=#333399>
R  <i>&lt;token&gt;</i>  <i>&lt;error report&gt;</i>  <i>&lt;;breakpoint status&gt;</i> 

<i>&lt;breakpoint status&gt;</i>
    <font face=Wingdings></font> <i>&lt;object&gt;</i>
</font></b></pre>

<p>Breakpoint status consists of a list of status properties. All properties are optional.
Tools and targets can define additional properties. Predefined properties are:</p>

<ul>
    <li><code><b><font face="Courier New" size=2 color=#333399>"Planted" : <i>&lt;array of addresses&gt;</i></font></b></code>
    <li><code><b><font face="Courier New" size=2 color=#333399>"Error" : <i>&lt;string&gt;</i></font></b></code>
    <li><code><b><font face="Courier New" size=2 color=#333399>"File" : <i>&lt;string&gt;</i></font></b></code>
    <li><code><b><font face="Courier New" size=2 color=#333399>"Line" : <i>&lt;int&gt;</i></font></b></code>
    <li><code><b><font face="Courier New" size=2 color=#333399>"Column" : <i>&lt;int&gt;</i></font></b></code>
</ul>

<h3><a name='CmdGetCapabilities'>Get Capabilities</a></h3>

<pre><b><font face="Courier New" size=2 color=#333399>
C  <i>&lt;token&gt;</i>  Breakpoints  getCapabilities  <i>&lt;string: context ID&gt;</i> 
</font></b></pre>

<p>The command reports breakpoint service capabilities to clients so they
can adjust to different implementations of the service.
When called with a null ("") context ID the global capabilities are returned,
otherwise context specific capabilities are returned.  A special capability
property is used to indicate that all child contexts have the same
capabilities..</p>

<p>Reply:</p>

<pre><b><font face="Courier New" size=2 color=#333399>
R  <i>&lt;token&gt;</i>  <i>&lt;error report&gt;</i>  <i>&lt;;service capabilities&gt;</i> 

<i>&lt;service capabilities&gt;</i>
    <font face=Wingdings></font> <i>&lt;object&gt;</i>
</font></b></pre>

<p>Service capabilities consist of a list of properties. All properties are optional.
Tools and targets can define additional properties. Predefined properties are:</p>

<ul>
    <li><code><b><font face="Courier New" size=2 color=#333399>"ID" : <i>&lt;string: context ID&gt;</i></font></b></code>
    - ID of a context that was used to query capabilities
    <li><code><b><font face="Courier New" size=2 color=#333399>"HasChildren" : <i>&lt;boolean&gt;</i></font></b></code>
    - if true, children of the context can have different capabilities
    <li><code><b><font face="Courier New" size=2 color=#333399>"Address" : <i>&lt;boolean&gt;</i></font></b></code>
    - if true, "Address" breakpoint property is supported
    <li><code><b><font face="Courier New" size=2 color=#333399>"Condition" : <i>&lt;boolean&gt;</i></font></b></code>
    - if true, "Condition" breakpoint property is supported
    <li><code><b><font face="Courier New" size=2 color=#333399>"FileLine" : <i>&lt;boolean&gt;</i></font></b></code>
    - if true, "File", "Line" and "Column" breakpoint properties are supported
</ul>

<h2><a name='Events'>Events</a></h2>

<p>Breakpoints service events are user to notify clients about breakpoint properties and status changes.
Note that contextAdded, contextChanged and contextRemoved events carry exactly same set
of breakpoint properties that was sent by a client to a target. The purpose of these events is to
let all clients know about breakpoints that were created by other clients.</p>

<pre><b><font face="Courier New" size=2 color=#333399>
E  Breakpoints  status  <i>&lt;string: breakpoint ID&gt;</i>  <i>&lt;breakpoint status&gt;</i> 
E  Breakpoints  contextAdded  <i>&lt;array of breakpoints&gt;</i> 
E  Breakpoints  contextChanged  <i>&lt;array of breakpoints&gt;</i> 
E  Breakpoints  contextRemoved  <i>&lt;array of breakpoint IDs&gt;</i> 
</font></b></pre>

<dl>
    <dt><b>status</b>
        <dd>is sent when breakpoint status changes.
    <dt><b>contextAdded</b>
        <dd>is sent when a new breakpoints are added.
    <dt><b>contextChanged</b>
        <dd>is sent when breakpoint properties change.
    <dt><b>contextRemoved</b>
        <dd>is sent when breakpoints are removed.
</dl>

<h2><a name='API'>API</a></h2>
 
<pre>
<font color=#3F5FBF>/**
 * Breakpoint is represented by unique identifier and set of properties.
 * Breakpoint identifier (String id) needs to be unique across all hosts and targets.
 * 
 * Breakpoint properties (Map&lt;String,Object>) is extendible collection of named attributes,
 * which define breakpoint location and behavior. This module defines some common
 * attribute names (see PROP_*), host tools and target agents may support additional attributes.
 * 
 * For each breakpoint a target agent maintains another extendible collection of named attributes:
 * breakpoint status (Map&lt;String,Object>, see STATUS_*). While breakpoint properties are
 * persistent and represent user input, breakpoint status reflects dynamic target agent reports
 * about breakpoint current state, like actual addresses where breakpoint is planted or planting errors.
 */</font>
<font color=#7F0055>public interface</font> IBreakpoints <font color=#7F0055>extends</font> IService {

    <font color=#3F5FBF>/**
     * Service name.
     */</font>
    <font color=#7F0055>static final</font> String NAME = "Breakpoints";

    <font color=#3F5FBF>/**
     * Breakpoint property names.
     */</font>
    <font color=#7F0055>static final</font> String   
        PROP_ID = "ID",                 // String
        PROP_ENABLED = "Enabled",       // Boolean
        PROP_ADDRESS = "Address",       // String
        PROP_CONDITION = "Condition",   // String
        PROP_FILE = "File",             // String
        PROP_LINE = "Line",             // Number
        PROP_COLUMN = "Column";         // Number

    <font color=#3F5FBF>/**
     * Breakpoint status field names.
     */</font>
    <font color=#7F0055>static final</font> String
        STATUS_PLANTED = "Planted",     // Array of addresses
        STATUS_ERROR = "Error",         // String
        STATUS_FILE = "File",           // String
        STATUS_LINE = "Line",           // Number
        STATUS_COLUMN = "Column";       // Number
    
    <font color=#3F5FBF>/**
     * Breakpoint service capabilities.
     */</font>
    <font color=#7F0055>static final</font> String
        CAPABILITY_CONTEXT_ID = "ID",                   // String
        CAPABILITY_HAS_CHILDREN = "HasChildren",        // Boolean
        CAPABILITY_ADDRESS = "Address",                 // Boolean
        CAPABILITY_CONDITION = "Condition",             // Boolean
        CAPABILITY_FILE_LINE = "FileLine";              // Boolean

    <font color=#3F5FBF>/**
     * Call back interface for breakpoint service commands.
     */</font>
    <font color=#7F0055>interface</font> DoneCommand {
        <font color=#7F0055>void</font> doneCommand(IToken token, Exception error);
    }

    <font color=#3F5FBF>/**
     * Download breakpoints data to target agent.
     * The command is intended to be used only to initialize target breakpoints table 
     * when communication channel is open. After that, host should 
     * notify target about (incremental) changes in breakpoint data by sending
     * add, change and remove commands.
     * 
     * @param properties - array of breakpoints.
     * @param done - command result call back object.
     */</font>
    IToken set(Map&lt;String,Object&gt;[] properties, DoneCommand done);

    <font color=#3F5FBF>/**
     * Called when breakpoint is added into breakpoints table.
     * @param properties - breakpoint properties.
     * @param done - command result call back object.
     */</font>
    IToken add(Map&lt;String,Object&gt; properties, DoneCommand done);

    <font color=#3F5FBF>/**
     * Called when breakpoint properties are changed.
     * @param properties - breakpoint properties.
     * @param done - command result call back object.
     */</font>
    IToken change(Map&lt;String,Object&gt; properties, DoneCommand done);

    <font color=#3F5FBF>/**
     * Tell target to change (only) PROP_ENABLED breakpoint property to 'true'.
     * @param ids - array of enabled breakpoint identifiers.
     * @param done - command result call back object.
     */</font>
    IToken enable(String[] ids, DoneCommand done);

    <font color=#3F5FBF>/**
     * Tell target to change (only) PROP_ENABLED breakpoint property to 'false'.
     * @param ids - array of disabled breakpoint identifiers.
     * @param done - command result call back object.
     */</font>
    IToken disable(String[] ids, DoneCommand done);

    <font color=#3F5FBF>/**
     * Tell target to remove breakpoints.
     * @param id - unique breakpoint identifier.
     * @param done - command result call back object.
     */</font>
    IToken remove(String[] ids, DoneCommand done);
    
    <font color=#3F5FBF>/**
     * Upload IDs of breakpoints known to target agent.
     * @param done - command result call back object.
     */</font>
    IToken getIDs(DoneGetIDs done);

    <font color=#7F0055>interface</font> DoneGetIDs {
        <font color=#7F0055>void</font> doneGetIDs(IToken token, Exception error, String[] ids);
    }

    <font color=#3F5FBF>/**
     * Upload properties of given breakpoint from target agent breakpoint table.
     * @param id - unique breakpoint identifier.
     * @param done - command result call back object.
     */</font>
    IToken getProperties(String id, DoneGetProperties done);

    <font color=#7F0055>interface</font> DoneGetProperties {
        <font color=#7F0055>void</font> doneGetProperties(IToken token, Exception error, Map&lt;String,Object&gt; properties);
    }

    <font color=#3F5FBF>/**
     * Upload status of given breakpoint from target agent.
     * @param id - unique breakpoint identifier.
     * @param done - command result call back object.
     */</font>
    IToken getStatus(String id, DoneGetStatus done);

    <font color=#7F0055>interface</font> DoneGetStatus {
        <font color=#7F0055>void</font> doneGetStatus(IToken token, Exception error, Map&lt;String,Object&gt; status);
    }

    <font color=#3F5FBF>/**
     * Report breakpoint service capabilities to clients so they
     * can adjust to different implementations of the service.
     * When called with a null ("") context ID the global capabilities are returned,
     * otherwise context specific capabilities are returned.  A special capability
     * property is used to indicate that all child contexts have the same
     * capabilities.
     * @param id - a context ID or null.
     * @param done - command result call back object.
     */</font>
    IToken getCapabilities(String id, DoneGetCapabilities done);

    <font color=#7F0055>interface</font> DoneGetCapabilities {
        void</font> doneGetCapabilities(IToken token, Exception error, Map&lt;String,Object&gt; capabilities);
    }

    <font color=#3F5FBF>/**
     * Breakpoints service events listener.
     * Note that contextAdded, contextChanged and contextRemoved events carry exactly same set
     * of breakpoint properties that was sent by a client to a target. The purpose of these events is to
     * let all clients know about breakpoints that were created by other clients.
     */</font>
    <font color=#7F0055>interface</font> BreakpointsListener {

        <font color=#3F5FBF>/**
         * Called when breakpoint status changes.
         * @param id - unique breakpoint identifier.
         * @param status - breakpoint status.
         */</font>
        <font color=#7F0055>void</font> breakpointStatusChanged(String id, Map&lt;String,Object&gt; status);

        <font color=#3F5FBF>/**
         * Called when a new breakpoints are added.
         * @param bps - array of breakpoints.
         */</font>
        <font color=#7F0055>void</font> contextAdded(Map&lt;String,Object&gt;[] bps);

        <font color=#3F5FBF>/**
         * Called when breakpoint properties change.
         * @param bps - array of breakpoints.
         */</font>
        <font color=#7F0055>void</font> contextChanged(Map&lt;String,Object&gt;[] bps);

        <font color=#3F5FBF>/**
         * Called when breakpoints are removed.
         * @param ids - array of breakpoint IDs.
         */</font>
        <font color=#7F0055>void</font> contextRemoved(String[] ids);
    }

    <font color=#3F5FBF>/**
     * Add breakpoints service event listener.
     * @param listener - object that implements BreakpointsListener interface.
     */</font>
    <font color=#7F0055>void</font> addListener(BreakpointsListener listener);

    <font color=#3F5FBF>/**
     * Remove breakpoints service event listener.
     * @param listener - object that implements BreakpointsListener interface.
     */</font>
    <font color=#7F0055>void</font> removeListener(BreakpointsListener listener);
}
</pre>

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