Java Callback Methods API

Callback methods are called by the HSYCO events management system.

By implementing these methods, you can associate your custom Java code to each event.

In some cases, the return values of these methods can influence the behavior of HSYCO.

Most of the methods, propagate exceptions to the top, that is to HSYCO internal code. In this case, HSYCO generates an error message in the log.

System Functions

DaylightEvent

static void DaylightEvent(boolean day)

Called at sunrise and sunset, according to the latitude and longitude values set in hsyco.ini, and the optional SunriseOffsetMinutes and SunsetOffsetMinutes parameters.

Parameters:

day: boolean - true at sunrise, false at sunset.

getUserVersion

static String getUserVersion()

This method returns a string, used by the HSYCO run-time to generate the user code version information log line at startup.

It is recommended to return a meaningful string with an appropriate identification of your user.java code and its version.

Returns:

String - user code version information.

haActiveEvent

static void haActiveEvent(boolean active)

Triggered by the change of state of an HSYCO server in a master/slave high availability configuration.

Parameters:

active: boolean - true if the server is active, false if not active.

PowerEvent

static int PowerEvent(int power)

Triggered by a change of the current power load level, as set using the powerSet() Java API or the POWER action.

Thanks to this method, you are allowed to alter the power value shown in the Web interface, for example to aggregate power readings acquired from other sensors.

Parameters:

power: int - the power level, in Watts.

Returns:

int - if PowerEvent() returns -1 or doesn't return a value, HSYCO status is updated with the detected power value, the value returned by PowerEvent() is otherwise used.

programTimerEvent

static void programTimerEvent(String name)

Called when a program timer is activated.

Program timers are set using programTimerSet(), programTimerReset(), programTimerRepeat(), or using the corresponding actions in EVENTS.

Parameters:

name: String - program timer name.

SchedulerEvent

static void SchedulerEvent(String groupname, String schedulename)

This callback blocking method allows to call user methods at configurable intervals.

Schedules are defined using a group name and a schedule name.

Schedules under the same group run in the same thread and are executed sequentially, based on their interval in milliseconds. Schedules in different groups run in parallel.

Parameters:

groupname: String - the scheduler’s group name
schedulename: String - the scheduler’s name.

StartupEvent

static void StartupEvent()

Called only once when HSYCO starts, after the initialization and HTTP server start-up, but before the execution of the different field interface threads. It is not executed in a thread, it is therefore a blocking method, that must complete its execution before all other HSYCO services can be started.

SunPositionEvent

static void SunPositionEvent(int azimuth, int elevation)

Called when the Sun changes its height with respect to the horizon or its angle from true north.

Parameters:

azimuth: int - the current Sun angle from true north, in decimal degrees
elevation: int - the current Sun elevation in decimal degrees from the horizon. Elevation is negative at night.

TimeEvent

static void TimeEvent(long time)

Called every 60 seconds.

HSYCO tries to synchronize the execution at the beginning of the minute, executing this method at seconds 0 of every minute.

note

However, the execution is not guaranteed. In case of heavy load HSYCO might not be able to execute the call with accurate timing. In extreme cases, it could occasionally skip some calls.

Parameters:

time: long - the current time in milliseconds.

varEvent

static void varEvent(String name, String value)

Triggered by the change of value of a program variable.

Parameters:

name: String - the variable name. Names are case-insensitive
value: String - the value to be assigned to the program variable.

Cameras

CameraCommandEvent

static int cameraCommandEvent(String function, String action, String camera)

Triggered by a camera control input from the Web interface.

It can be used to execute arbitrary actions when the user clicks on the active areas of the camera view, or to replace some or all of the standard PTZ commands with custom actions.

Parameters:

function: String - see the table below
action: String - see the table below
camera: String - the camera name.

Returns:

int - if CameraCommandEvent() returns -1 or doesn't return a value, the standard PTZ command associated to the PTZ driver is skipped, otherwise it is executed normally.

Icon	Function	Action
	focus	far
	focus	near
	zoom	tele
	zoom	wide
	move	left
	move	right
	move	up
	move	down
	move	stop

CameraMotionEvent

static void CameraMotionEvent(String eventName, long remoteTime)

Called when HSYCO starts recording video from a camera.

Recording starts when a camera notifies a recording request with the recording HTTP API call (the zone=id portion is optional):

http://192.168.0.50/x/camerarec?camera=name&zone=id

Recording can also be triggered by the CameraRecTrigger() Java method or JavaScript function, or the CAMERAREC or CAMERARECFULL actions in EVENTS.

Parameters:

eventName: String - the event identification string, either the camera name only or name:id if recording is triggered by a camerarec HTTP call with the optional zone=id parameter
remoteTime: long - the current time in milliseconds.

CameraViewEvent

static void CameraViewEvent(String camera, boolean active)

CameraViewEvent() is called on changes of the live view status of cameras.

When at least one web client is showing the live feed from a camera, the camera is marked as active.

When no live feed request is received for a several consecutive seconds, the camera is marked as not active.

Parameters:

camera: String - the camera name
active: boolean - true if active, false if not.

Datasources

caution

WARNING! The Datasource functionality is experimental. The documentation is incomplete.

dataSourceQuery

JSONObject dataSourceQuery(String session, String userid, String datasourceid, String[] columns)

Called when datasource data is requested. Supports direct callback by @dataSourceQuery annotations

Parameters:

session: string - session id string that uniquely identifies the client session
userid: string - the user id
dataSourceId: string - the datasource id
columns: String[] - array of column ids

Returns:

JSONObject

dataSourceInsert

JSONObject dataSourceInsert(String session, String userid, String datasourceid, String[] columns, JSONObject data, boolean before)

Called when an insert operation is attempted. Triggers a session refresh if it returns true. Supports direct callback by @dataSourceInsert annotations

session: string - session id string that uniquely identifies the client session
userid: string - the user id
dataSourceId: string - the datasource id
columns: String[] - array of column ids
data: JSONObject - { "rows": ["col 1 value>", "col 2 value>", ...] }
before : boolean - true if the callback was called before the execution of SQL code, false otherwise

Returns:

JSONObject

dataSourceUpdate

JSONObject dataSourceUpdate(String session, String userid, String datasourceid, String[] columns, JSONObject data, boolean before)

Called when an update operation is attempted. Triggers a session refresh if it returns true. Supports direct callback by @dataSourceUpdate annotations

session: string - session id string that uniquely identifies the client session
userid: string - the user id
dataSourceId: string - the datasource id
columns: String[] - array of column ids
data: JSONObject - { "rows": ["col 1 value>", "col 2 value>", ...] }
before : boolean - true if the callback was called before the execution of SQL code, false otherwise

Returns:

JSONObject

dataSourceDelete

JSONObject dataSourceDelete(String session, String userid, String datasourceid, JSONObject data, boolean before)

Called when a delete operation is attempted. Triggers a session refresh if it returns true. Supports direct callback by @dataSourceDelete annotations

session: string - session id string that uniquely identifies the client session
userid: string - the user id
dataSourceId: string - the datasource id
columns: String[] - array of column ids
data: JSONObject - { "rows": ["key 1>", "key 2>", ... ] }
before : boolean - true if the callback was called before the execution of SQL code, false otherwise

Returns:

JSONObject

Annotations examples

In the Java computer programming language, an annotation is a form of syntactic metadata that can be added to Java source code. An annotation can be used in a datasource's callbacks to directly call a function whenever the datasource id matches the one specified in the annotation, as shown in the following example:

@dataSourceInsert("datasourceid") 
 public static JSONObject dataSourceInsertTask(String session, String userid, String datasourceid, String[] columns, JSONObject data, boolean before) { 
  ...
 }

Using annotations does not preclude the normal callback from being called.

DMX

DmxEvent

static void DmxEvent(int channel, int state)

Called after changes to DMX-512 channels.

Parameters:

channel: int - DMX channel address, from 1 to 512 which might be preceded by the DMX gateway number, starting from 0
state: int - the new channel value, from 0 to 255.

DmxFilter

static int DmxFilter(int channel, int state, boolean reverse)

This method allows to filter the value of the status of each channel on the DMX-512 buses, sending to the gateway different values from those set in HSYCO.

This way, it is possible to apply chromatic corrections, or any on the fly translation of channels values.

note

This is a blocking method and is called when sending commands to the DMX gateway.

It is also called after reading current channels values from the gateway. In this case the conversion function should be symmetric and return a complementary value.

Parameters:

channel: int - the DMX channel address, from 1 to 512 which might be preceded by the DMX gateway number, starting from 0
state: int - the unfiltered value of the channel, from 0 to 255
reverse: boolean - false if called when writing to the gateway; true if called when reading from the gateway.

Returns:

int - the channel value that will be sent to the DMX gateway.

note

The JavaScript DmxFilter function is called only when the Java DmxFilter callback is not defined or returned the original value.

DmxStartupEvent

static void DmxStartupEvent(int serverIndex)

Called when starting the monitor threads for each DMX bus, once per bus at the start of the execution of HSYCO, and also after every restart of the monitor thread, for example after communication errors.

It is safe, inside this method, to execute command methods for the same DMX gateway.

note

This is a blocking method. The DMX driver will start after this function returns.

Parameters:

serverIndex: int - number of the DMX bus, starting from 0.

Infrared Control

IREvent

static void IREvent(boolean received, int irtransid, String event)

This method is called when an IRTrans receives or sends an IR command from its local IR database.

note

IRTrans can only receive and decode infrared commands that have been previously stored in its internal FLASH memory database.

Parameters:

received: boolean - true if the command has been received by the IRTrans, false if sent
irtransid: int - IRTrans number, starting from 0 for the first device, based on the listing order of the IRTrans parameter in hsyco.ini
event: String - the string of the command received or issued, formatted as: "remote_name,command".

I/O Servers

IOEvent

static void IOEvent(String id, String value)

Triggered by the value change of any data point of an I/O server.

Parameters:

id: String - the server id and the name of the data point. According to the type of server, the format changes but it generally appears as server name, as declared the ioServers parameter in hsyco.ini, followed by a specific name representing the data point within the system
value: String - the new value. For binary inputs or outputs, the returned values are 0 or 1.

IOStartupEvent

static void IOStartupEvent(int serverIndex)

Triggered by the start of the communication thread of each I/O server - once for each server at the beginning of the execution of HSYCO, and also after every reboot of the communication thread, for example after communication errors.

note

This is a blocking method. The I/O server driver will start after this function returns.

Parameters:

serverIndex: int - the I/O server number, starting from 0, based on the listing order of the ioServers parameter in hsyco.ini.

Modbus

For detailed information about the Modbus protocol, and the response PDU formats, you should refer to the MODBUS Application Protocol Specification V1.1b documentation at: http://www.modbus.org/docs/Modbus-Application-Protocol-V1-1b.pdf

ModbusEvent

static byte[] ModbusEvent(String name, InetAddress addr, int unitid, byte[] pdu)

Called by the Modbus Server I/O Server on every Modbus request received from a Modbus client.

The returned byte array is used as the Modbus response PDU (function code and data).

Parameters:

name: String - the name of the Modbus Server I/O server
addr: InetAddress - IP address of the Modbus client
unitid: int - the unit id set in the received Modbus request
pdu: byte[] - the request PDU data, in hexadecimal string format.

Returns:

byte[] - the response PDU data.

Location Services

LocationEvent

static void LocationEvent(long mac, InetAddress ip, int zoneId)

Called, if the location service is active, when a variation in the association of a client to the Wi-Fi Access Points is detected.

Parameters:

mac: long - the MAC address of the client
ip: InetAddress - the IP address of the client, if available, or null (the IP address could be null if the associated device is not connected to the HSYCO Web interface)
zoneId: int - in case of association, it is the Access Point sequence number, according to the order defined in the LocationBases parameter in hsyco.ini; -1 if the client was de-associated from the Wi-Fi network.

LocationBeaconEvent

caution

The Beacons functionality for iOS is experimental and subject to changes.

static void LocationBeaconEvent(String session, String address, String userid, String zone, String distance, boolean background)

Called when the HSYCO App detects a change in the proximity of one of the configured beacons. See Beacons on HSYCO App for iOS for additional information.

There is no guarantee that the event would be fired.

Network delays or errors could cause delayed triggering of this event.

Parameters:

session: String - session id string that uniquely identifies the client session
address: String - the beacon's address
userid: String - the user id
zone: String - the beacon's zone
distance: String - far, near, immediate or off
background: boolean - true if the app called the server while in background mode (app closed)

LocationGeoEvent

LocationGeoEvent(String session, String address, String userid, double lat, double lon, double alt, double speed, double course, double ah, double av, double as, double ac, boolean background)

Called when a geographic location notification is sent by an HSYCO iOS or Android app.

Parameters:

session: String - session id string that uniquely identifies the client session
address: String - the beacon's address
userid: String - the user id
lat: double - geographic coordinates latitude, in decimal degrees (positive east, negative west)
lon: double - geographic coordinates longitude, in decimal degrees (positive north, negative south)
alt: double - altitude, in meters
speed: double - speed, in meters per second
course: double - course, in decimal degrees
ah: double - radius of uncertainty for the location, in meters
av: double - accuracy of the altitude value, in meters
as: double - accuracy of the speed value, in meters per second
ac: double - accuracy of the course value, in degrees
background: boolean - true if the app called the server while in background mode (app closed).

Network Services

httpCallEvent

static String httpCallEvent(String address, boolean secure, String query)

Called when the HSYCO HTTP server receives a GET request with the following path:

/x/httpcall?query

This is an example of an HTTP Call

http://HSYCO SERVER IP/x/httpcall?example=1

note

The HTTP client's IP address must be in the trusted network range, or the httpcall request will be rejected, unless HTTPServerLowSecurityEnabled is true and the request is sent using HTTPS

This method returns a string, that will be sent as the text/plain answer to the HTTP client (with HTTP response code 200).

HSYCO will return a 404 Not Found response code if all of the following conditions are true:

no HTTP event matches the query in EVENTS
the httpCallEvent JavaScript callback is not defined in EVENTS, or doesn't return a value
the httpCallEvent Java callback is not defined in user.java or in any plugins, or returns null.

If the httpCallEvent is defined both in JavaScript and Java, the Java version return value (unless null) will be used in the HTTP response.

Parameters:

address: String - the IP address of the HTTP client
secure: boolean - true if the request is sent to the HTTPS server, false if the request is sent to the HTTP server
query: String - the string following the ? in the URL path.

Returns:

String - the string to send as the text/plain answer to the HTTP client.

httpRawEvent

static void httpRawEvent(String host, boolean secure, String version, String httpmethod, boolean gzip, String contenttype, String query, String session, String userid, BufferedOutputStream out, BufferedInputStream in)

Called when the HSYCO HTTP server receives a GET or POST request with the following path:

/x/raw

note

The httpRawEvent is called only if the HTTP client's IP address is in the trusted network range and the HTTPServerLowSecurityEnabled option is true, or if the request has a valid user authentication cookie

The application code inside the httpRawEvent() method should write a complete HTTP response (both headers and body) to the BufferedOutputStream passed as parameter.

If multiple httpRawEvent() callbacks are defined, only one should write the HTTP response to the BufferedOutputStream.

Parameters:

host: String - the IP address of the HTTP client
secure: boolean - true if the request is sent to the HTTPS server, false if the request is sent to the HTTP server
version: String - the HTTP version, as passed in the HTTP request header
httpmethod: String - the HTTP request's method, "GET", "POST" or "HEAD"
gzip: boolean - true if the client accepts compressed content (the Accept-Encoding header contains "gzip")
contenttype: String - the HTTP request's content type (value of Content-Type header)
query: String - the string following the ? in the URL path, or null if not present
session: String - the authenticated session id, or null
userid: String - the user id for requests having a valid authentication cookie, null otherwise
out: BufferedOutputStream - the output stream that the application code should use to write the full HTTP response
in: BufferedInputStream - the input stream that the application code should read to retrieve the POST data, or null for GET or HEAD requests.

Example:

public static void httpRawEvent(String host, boolean secure, String version, String httpmethod, boolean gzip, String contenttype, String query, String session, String userid, BufferedOutputStream out, BufferedInputStream in) throws Exception {
 	Writer w = new OutputStreamWriter(out, "UTF-8");
 	SimpleDateFormat dateFormat = new SimpleDateFormat(DateUtils.PATTERN_RFC1123);

if (httpmethod.equals("POST")) {
 		byte[] bb = new byte[1024];
 		int i = 0;
 		StringBuffer sb = new StringBuffer();
  		while((i = in.read(bb)) != -1) {
 			sb.append(new String(bb, 0, i, "UTF-8"));
 		}
 		String content = "Post data echoed from host [" + host + "] : " + sb.toString() + "\r\n";
 		w.write(version);
 		w.write(" 200 OK\r\n");
 		w.write("Date: " + dateFormat.format(new Date()) + "\r\n");
 		w.write("Server: HSYCO/" + hsyco.VERSION + "\r\n");
 		w.write("Content-length: " + content.length() + "\r\n");
 		w.write("Content-type: text/plain\r\n");
 		w.write("Cache-Control: no-store, no-cache\r\n\r\n");
 		w.write(content);
 		w.flush();
 	} else {
 		w.write(version);
 		w.write(" 400 Not Found\r\n");
 		w.write("Date: " + dateFormat.format(new Date()) + "\r\n");
 		w.write("Server: HSYCO/" + hsyco.VERSION + "\r\n");
 		w.write("Content-length: " + 0 + "\r\n");
 		w.write("Content-type: text/plain\r\n");
 		w.write("Cache-Control: no-store, no-cache\r\n\r\n");
 		w.flush();
 	}
 }

SysLogEvent

static void SysLogEvent(String address, String log)

Called when the HSYCO SYSLOG server receives a log message from a network client.

Note that this is a blocking call. The SYSLOG server will not process further messages until the last call has been processed.

Parameters:

address: String - the IP address of the SYSLOG client
log: String - SYSLOG log message.

PBX

PBXCallEvent

static boolean PBXCallEvent(String host, String caller, String called)

Called when a call notification is sent to HSYCO by the PBX system.

If the method returns true, the request is recorded on the log file with the [OK] status, with [ERROR] otherwise.

The PBX should generate HTTP requests to the HSYCO Web Server, using the following formats:

http://192.168.0.50/x/vcall/<from>/<to>

or:

http://192.168.0.50/x/vcall?from=<from>&to=<to>

For example, the HTTP request:

http://192.168.0.50/x/vcall?from=21&to=25

is interpreted as a call notification from internal number 21 to number 25.

note

The HTTP client's IP address must be in the trusted network range, or the httpcall request will be rejected.

Parameters:

host: String - the IP address of the PBX server
caller: String - the caller number
called: String - the called number.

Returns:

boolean - return true to generate a log entry with [OK] status, false for [ERROR] status.

Squeezebox

SlimPowerEvent

static void SlimPowerEvent(int index, int power)

Called when a Squeezebox player is turned on or off.

Parameters:

index: int - player number, starting from 0 for the first player, based on the listing order of the slimPlayers parameter in hsyco.ini
power: int - 0: OFF, 1: ON.

SlimStatusEvent

static void SlimStatusEvent(int index, int status)

Called when a Squeezebox player changes its playback mode.

Parameters:

index: int - player number, starting from 0 for the first player, based on the listing order of the slimPlayers parameter in hsyco.ini
status: int - 0: OFF, 1: ON, 2: PAUSE, 3: PLAY, -1: UNKNOWN.

SlimVolumeEvent

static void SlimVolumeEvent(int index, int volume)

Called when a Squeezebox player changes its volume level.

Parameters:

index: int - player number, starting from 0 for the first player, based on the listing order of the slimPlayers parameter in hsyco.ini
volume: int - an integer number representing the volume change (not the absolute audio level) in a scale from 0 to 100; positive numbers correspond to a volume increase, negative numbers to a decrease.

Timers and Schedulers

UserTimerEvent

static boolean UserTimerEvent(String name, boolean active)

Called when a user timer or scheduler’s rule should be activated, and before executing the associated action in EVENTS.

It is also executed at the timer or scheduler’s rule deactivation.

This method must return a true value in order to make the timer or rule actually active and the associated actions executed.

Whenever the method returns false, the timer will not be activated, and the method will be called again once a minute for the scheduled duration of the timer.

In the same way, if the method returns false when the timer or rule is deactivated, the timer or rule will not be deactivated, extending the timer activation beyond the scheduled duration.

This is a blocking method.

Parameters:

name: String - timer name or scheduler’s rule name
active: boolean - true when activating and false when deactivating the timer or scheduler’s rule.

Returns:

boolean - true to confirm the timer event, false to block the event.

note

The JavaScript UserTimerEvent function is alway called, but its return value is used only when the Java UserTimerEvent callback is not defined or returned true.

User Interface

pageEvent

static void pageEvent(String address, String session, String userid, String project, String page)

Called when a Web client initially loads a project and when navigating between pages.

There is no guarantee that the event would be fired the exact moment the page is loaded.

Network delays or errors could cause delayed triggering of this event.

Parameters:

address: String - the client’s IP address string in textual presentation
session: String - session id string that uniquely identifies the client session
userid: String - the user id
project: String - project’s id
page: String - the page id of the current page, with the #landscape or #portrait suffix if the page has distinct orientation versions in the project.

loginEvent

static void loginEvent(String address, String session, String userid)

Called when a user authenticates with a valid PIN or PIN/PUK.

Note that, while the session string passed to the pageEvent callback contains the browser global session id followed by a web view id, the session string passed to loginEvent only contains the global session id. The global session id is the portion of session id that is common between multiple web views open concurrently on the same web browser.

Parameters:

address: String - the client’s IP address string in textual presentation
session: String - session id string that uniquely identifies the client session
userid: String - the user id.

logoutEvent

static void logoutEvent(String address, String session, String userid, boolean lock)

Called when a user logs out or locks the user interface.

Note that, while the session string passed to the pageEvent callback contains the browser global session id followed by a web view id, the session string passed to logoutEvent only contains the global session id. The global session id is the portion of session id that is common between multiple web views open concurrently on the same web browser.

Parameters:

address: String - the client’s IP address string in textual presentation
session: String - session id string that uniquely identifies the client session
userid: String - the user id
lock: boolean - false when logging out; true when the user locks the user interface.

uiClearEvent

static void uiClearEvent(String session)

Called, following an explicit call of uiClear() or after the client session inactivity timeout expires, if the client session becomes active again (i.e. the client starts handshaking again with the server with the same session id).

Parameters:

session: String - session id string that uniquely identifies the client session.

userCommand

static String userCommand(String name, String param)

Called by user clicks on buttons created in the Web interface with the Button object in action Command mode, by a USER action in EVENTS, or by the user() Java method and JavaScript function. Also triggered by by the screensaver page.

This method returns a string. Any returned string causes the log of an [OK] status. If you want to prevent logging, for example to avoid sensitive information to be written in the log file, you should return the string !.

If you want to navigate to a specific page when the button is pressed (it would be like pressing a Button object in Link action mode), return a string starting with "page:" followed by the page name; in this case, userCommand() will be called again when that popup or page is closed, with "/close" appended to param.

You can also use "page:back" or "page:forward" to move back and forth along the pages' navigation history. Use "page:close" to close a popup.

Page in userCommand response also accepts an array of pages (or a comma separated list). Useful to close all popups and open another one, or open a different page and then a popup…

function userCommand(session, userid, name, param): {
    if (name == "mylink") {
        return { page: ["close-all", "popup2"] };
    }
}

When the interface is loaded inside the HSYCO App (iOS or Android), you can send a specific command to the app by returning a string that starts with “app:“ followed by the command; the commands currently supported are “speech“, which enables the speech recognition, and “codescan“ which enables qr/bar code scanning.

Use copy:<text> to copy a text in the clipboard. In the HSYCO App you can also use share:<text> to open a popup with various options. This will behave like "copy" on browser.

note

As this callback may return data synchronously to the Web interface in response to a user command, its execution should be fast enough to avoid the timeout of the browser's request. To ensure a safe margin, it should complete in no more than one second.

Parameters:

name: String - the name field of the (user) object
param: String - the param of the (user) object.

Returns:

null: an [ERROR] status is logged in the log file, while any other string causes the log of an [OK] status.
"page:page name": navigate to the specified page
"page:back": navigate to the previous page
"page:forward": navigate to the next page
"page:close": if the user button that generated the call has an open popup linked to it, close it
"copy:<text>": tells the browser or HSYCO App to copy the text in the clipboard. On browser it will display a confirm popup with the text to be copied.
"share:<text>": tells the HSYCO App to show a share popup with various options (copy, send through email, save to files etc.). On browser it will behave like copy.

userCommand - with session information

static String userCommand(String session, String userid, String name, String param)

Same as userCommand(String name, String param), but with additional session and user id information passed as parameters. You should only use one of the two userCommand() callback methods in user.java. If you declare both, only this four parameters version will be called.

note

Parameters:

session: string - a session id string that uniquely identifies the client session
userid: string - the user id
name: String - the name field of the (user) object
param: String - the param of the (user) object.

Returns:

null: an [ERROR] status is logged in the log file, while any other string causes the log of an [OK] status.
"page:page name": navigate to the specified page
"page:back": navigate to the previous page
"page:forward": navigate to the next page
"page:close": if the user button that generated the call has an open popup linked to it, close it
"copy:<text>": tells the browser or [[HSYCO App]] to copy the text in the clipboard. On browser it will display a confirm popup with the text to be copied.
"share:<text>": tells the [[HSYCO App]] to show a share popup with various options (copy, send through email, save to files etc.). On browser it will behave like copy.

userSubmit

static String userSubmit(String session, String uid, String name, HashMap<String, String> fields)

This callback is similar to userCommand(String session, String uid, String name, String param) and should be used only when the four parameters version of userCommand() is also defined in user.java.

When userSubmit() is defined, it will be called when a (submit!id), (submitmini!id) or (submitmicro!id) button is pressed, while userCommand() will continue to be called on (user) buttons.

userSubmit() provides a more convenient access to the values of multiple input fields in a form.

This function can optionally return a string. Any returned string causes the log of an [OK] status. If you want to prevent logging, for example to avoid sensitive information to be written in the log file, you should return the string !.

You can also use "page:back" or "page:forward" to move back and forth along the pages' navigation history. Use "page:close" to close a popup.

Use copy:<text> to copy a text in the clipboard. In the HSYCO App you can also use share:<text> to open a popup with various options. This will behave like "copy" on browser.

note

Parameters:

session: String - a session id string that uniquely identifies the client session
userid: String - the user id
name: String - the id of the (submit!id) object
fields: HashMap< String, String> - the hash map of all input fields in the container where the (submit) object is located.

Returns:

null: an [ERROR] status is logged in the log file, while any other string causes the log of an [OK] status.
"page:page name": navigate to the specified page
"page:back": navigate to the previous page
"page:forward": navigate to the next page
"page:close": if the user button that generated the call has an open popup linked to it, close it
"copy:<text>": tells the browser or HSYCO App to copy the text in the clipboard. On browser it will display a confirm popup with the text to be copied.
"share:<text>": tells the HSYCO App to show a share popup with various options (copy, send through email, save to files etc.). On browser it will behave like copy.

WebRootRequestEvent

static String WebRootRequestEvent(InetAddress addr, boolean secure, String useragent)

This method is called when the Web server receives a root URL request. It can return a string to redirect the browser to a valid URL, or null to prevent redirection.

note

As this callback returns data synchronously to the Web interface in response to the HTTP request, its execution should be fast enough to avoid the timeout of the browser's request. To ensure a safe margin, it should complete in no more than one second.

Parameters:

addr: InetAddress - the HTTP client’s address
secure: boolean - true if this is an HTTPS request
useragent: String - the Web browser’s user agent information.

Returns:

String - optional return string containing a valid absolute or relative URL

System Functions​

DaylightEvent​

getUserVersion​

haActiveEvent​

PowerEvent​

programTimerEvent​

SchedulerEvent​

StartupEvent​

SunPositionEvent​

TimeEvent​

varEvent​

Cameras​

CameraCommandEvent​

CameraMotionEvent​

CameraViewEvent​

Datasources​

dataSourceQuery​

dataSourceInsert​

dataSourceUpdate​

dataSourceDelete​

Annotations examples​

DMX​

DmxEvent​

DmxFilter​

DmxStartupEvent​

Infrared Control​

IREvent​

I/O Servers​

IOEvent​

IOStartupEvent​

Modbus​

ModbusEvent​

Location Services​

LocationEvent​

LocationBeaconEvent​

LocationGeoEvent​

Network Services​

httpCallEvent​

httpRawEvent​

SysLogEvent​

PBX​

PBXCallEvent​

Squeezebox​

SlimPowerEvent​

SlimStatusEvent​

SlimVolumeEvent​

Timers and Schedulers​

UserTimerEvent​

User Interface​

pageEvent​

loginEvent​

logoutEvent​

uiClearEvent​

userCommand​

userCommand - with session information​

userSubmit​

WebRootRequestEvent​

System Functions

DaylightEvent

getUserVersion

haActiveEvent

PowerEvent

programTimerEvent

SchedulerEvent

StartupEvent

SunPositionEvent

TimeEvent

varEvent

Cameras

CameraCommandEvent

CameraMotionEvent

CameraViewEvent

Datasources

dataSourceQuery

dataSourceInsert

dataSourceUpdate

dataSourceDelete

Annotations examples

DMX

DmxEvent

DmxFilter

DmxStartupEvent

Infrared Control

IREvent

I/O Servers

IOEvent

IOStartupEvent

Modbus

ModbusEvent

Location Services

LocationEvent

LocationBeaconEvent

LocationGeoEvent

Network Services

httpCallEvent

httpRawEvent

SysLogEvent

PBX

PBXCallEvent

Squeezebox

SlimPowerEvent

SlimStatusEvent

SlimVolumeEvent

Timers and Schedulers

UserTimerEvent

User Interface

pageEvent

loginEvent

logoutEvent

uiClearEvent

userCommand

userCommand - with session information

userSubmit

WebRootRequestEvent