I really got some trouble with this part of code. When I compile, it has an error that no matching function for call to 'HTTPClient::begin(WiFiClient&, String&)'. Can you guys help me? this will be uploaded to the board Wemos d1 mini pro.
The part of the code: ( I have include the wifi client library)
void PiHoleClient::getGraphData(String server, int port) {
HTTPClient http;
String apiGetData = "http://" + server + ":" + String(port) + "/admin/api.php?overTimeData10mins";
resetBlockedGraphData();
Serial.println("Getting Pi-Hole Graph Data");
Serial.println(apiGetData);
http.begin(wifiClient, apiGetData);
int httpCode = http.GET();
String result = "";
errorMessage = "";
boolean track = false;
int countBracket = 0;
blockedCount = 0;
The error:
exit status 1
no matching function for call to 'HTTPClient::begin(WiFiClient&, String&)'
Related
In a java service, without a function declaration, a function call is there and only compile time error comes. But the output is as expected with no run time errors. How is that possible? Can anyone please explain?
"The method functionName() is undefined" is the error it shows.
Below is the code.
public static final void documentToStringVals(IData pipeline)
throws ServiceException {
// pipeline
IDataCursor pipelineCursor = pipeline.getCursor();
String success = "false";
IData inputDoc = null;
String outputValue = "";
String headerYN = "N";
boolean headerValue = false;
String delimiter = ",";
String newline = System.getProperty("line.separator");
if (pipelineCursor.first("inputDocument") ) {
inputDoc = (IData) pipelineCursor.getValue();
}
else {
throw new ServiceException("inputDocument is a required parameter");
}
if (pipelineCursor.first("delimiter") ) {
delimiter = (String) pipelineCursor.getValue();
}
if (pipelineCursor.first("headerYN") ) {
headerYN = (String) pipelineCursor.getValue();
}
if (headerYN.equalsIgnoreCase("Y")) {
headerValue = true;
}
try {
outputValue = docValuesToString(inputDoc, headerValue, delimiter);
outputValue += newline;
success = "true";
}
catch (Exception e) {
System.out.println("Exception in getting string from document: " + e.getMessage());
pipelineCursor.insertAfter("errorMessage", e.getMessage());
}
pipelineCursor.insertAfter("success", success);
pipelineCursor.insertAfter("outputValue", outputValue);
pipelineCursor.destroy();
}
The code you posted has no reference to "functionName", so I suspect there's a reference to it either in the shared code section or in another Java service in the same folder. Given that all Java services in a folder get compiled into a single class, and therefore all those services need to be compiled together, this could cause the error message when you're compiling the service above.
a friend and I are trying to write a program in Processing. The program needs to be able to connect to our MySQL database pull information at random and display it. we have gotten that much to work. with the following code
import de.bezier.data.sql.*;
MySQL dbconnection;
void setup()
{
size( 100, 100 );
String user = "username";
String pass = "password";
// name of the database to use
String database = "databasename";
// name of the table that will be created
//
String table = "tablename";
//
dbconnection = new MySQL( this, "ip", database, user, pass );
if ( dbconnection.connect() )
{
// now read it back out
//
dbconnection.query( "SELECT COUNT(id) FROM quiz_table" );
dbconnection.next();
int NumberOfRows = dbconnection.getInt(1);
float random = random(1, NumberOfRows);
int roundrandom = round(random);
println(" Row Number: " + roundrandom );
dbconnection.query( "SELECT * FROM quiz_table WHERE id =" + roundrandom);
while (dbconnection.next())
{
int n = dbconnection.getInt("id");
String a = dbconnection.getString("name");
String c = dbconnection.getString("charactor");
String m = dbconnection.getString("game");
int y = dbconnection.getInt("year");
String q= dbconnection.getString("quote");
println(n + " " + a + " " + c + " " + m + " " + y + " " + q);
}
}
else
{
// connection failed !
}
}
void draw()
{
// i know this is not really a visual sketch ...
}
this seems to work fine. however we plan to make the program preform many more tasks and to keep things more manageable we wanted to make somethings objects in this case i want to make an object that will connect to the database when its called. The following is what i have come up with but despite reworking several ways I can't quite get it to work.
import de.bezier.data.sql.*;
MySQL dbconnection;
connect1 myCon;
void setup()
{
size(300,300);
myCon = new connect1("username","password","database","table");
myCon.dbconnect();
}
void draw()
{
}
class connect1 {
String user;
String pass;
String data;
String table;
connect1(String tempuser, String temppass, String tempdata, String temptable) {
user = tempuser;
pass = temppass;
data = tempdata;
table = temptable;
}
void dbconnect(){
dbconnection = new MySQL( this, "ip", data, user, pass );
if ( dbconnection.connect() )
{
// now read it back out
dbconnection.query( "SELECT COUNT(id) FROM table" );
dbconnection.next();
int NumberOfRows = dbconnection.getInt(1);
float random = random(1, NumberOfRows);
int roundrandom = round(random);
println(" Row Number: " + roundrandom );
dbconnection.query( "SELECT * FROM table WHERE id =" + roundrandom);
while (dbconnection.next())
{
int n = dbconnection.getInt("id");
String a = dbconnection.getString("name");
String c = dbconnection.getString("charactor");
String m = dbconnection.getString("game");
int y = dbconnection.getInt("year");
String q= dbconnection.getString("quote");
println(n + " " + a + " " + c + " " + m + " " + y + " " + q);
}
}
else
{
println("fail");
}
}
//end of class
}
Sorry if that is at all hard to understand
The constructor of MySQL expects a PApplet as the first argument. When you call new MySQL(this inside your object, this does no longer refer to the main PApplet as it did in your first program.
The simplest way to fix this might be:
myCon.dbconnect(this); // send the PApplet as argument
...
void dbconnect(PApplet parent) {
dbconnection = new MySQL( parent, "ip", data, user, pass );
...
Another option would be to pass the PApplet to the constructor of your object, storing it in a property, and using that property when calling new MySQL.
I'm having some issue with simple parsing of JSON from Arduino to Processing, here is the following code.
ARDUINO CODE
int x,y;
void setup()
{
Serial.begin(9600);
}
void loop()
{
sendJSON();
delay(500);
}
void sendJSON(){
String json;
json = "{\"accel\":{\"x\":";
json = json + x;
json = json + ",\"y\":";
json = json + y;
json = json + "}}";
Serial.println(json);
}
PROCESSING CODE
import processing.serial.*;
Serial myPort;
JSONObject json;
int x,y;
void setup () {
size(200, 200);
myPort = new Serial(this, Serial.list()[5], 9600);
myPort.bufferUntil('\n');
}
void draw () {
}
void serialEvent (Serial myPort) {
while (myPort.available() > 0) {
String inBuffer = myPort.readString();
if (inBuffer != null) {
json = loadJSONObject(inBuffer);
JSONObject acc = json.getJSONObject("accel");
int x = acc.getInt("x");
int y = acc.getInt("y");
println(x + ", " + y);
}
}
}
On the serial monitor i'm having the right string :
{"accel":{"x":451,"y":-118}}
However on the Processing sketch i'm having the following error :
{ does not exist or could not be read
Error, disabling serialEvent() for /dev/tty.usbmodem1421
null
or sometime even :
{"":{"x":456,"y":-123}} does not exist or could not be read Error,
I would be very grateful if someone could give me some help in debugging this current issue !
Thank you very much !
I would recommend transmitting this as binary data which you can unpack on the processing side. It should solve your json problem and will be much more efficient. Something like this should work for you...
Arduino code
byte Rx_Data[4];
Tx_Data[0] = accelX >> 8 & 0xff;
Tx_Data[1] = accelX& 0xff;
Tx_Data[2] = accelY >> 8 & 0xff;
Tx_Data[3] = accelY& 0xff;
Serial.write(Data_Packet);
Processing code
byte Tx_Data[4];
if(Serial.available() == 4) {
for(int i=0;i<4;i++){
Tx_Data[i] = Serial.read();
}
}
int accelX = Tx_Data[0] << 8 | Tx_Data[1];
int accelY = Tx_Data[2] << 8 | Tx_Data[3];
My Java API compares Team members from another application with Rally. The compared results is updated in Rally. It takes the reference of Project name and Res name.
The code throws "java.lang.IndexOutOfBoundsException: Index: 0, Size: 0" error. I coudn't spot the error. Could some one help? Following is the code and the output
package teammembership;
import com.google.gson.JsonArray;
import com.google.gson.JsonObject;
import com.rallydev.rest.RallyRestApi;
import com.rallydev.rest.request.QueryRequest;
import com.rallydev.rest.response.QueryResponse;
import com.rallydev.rest.request.UpdateRequest;
import com.rallydev.rest.response.UpdateResponse;
import com.rallydev.rest.util.Fetch;
import com.rallydev.rest.util.QueryFilter;
import java.io.IOException;
import java.net.URI;
import java.net.URISyntaxException;
import java.io.*;
import java.sql.*;
import javax.xml.parsers.DocumentBuilder;
import org.apache.soap.util.xml.*;
import org.w3c.dom.*;
//import org.json.*;
//import static projectteammembers.JsonUtil.getJsonValue;
public class TeamMembership {
public static Connection makeConnection(String propertiesFile) throws SQLException, Exception {
Connection conn = null;
DocumentBuilder docBuilder = XMLParserUtils.getXMLDocBuilder();
Document doc = docBuilder.parse(new File(propertiesFile));
// Retrieve database parameters
Element database = (Element) doc.getElementsByTagName("database").item(0);
String url = database.getAttribute("url");
String serviceId = database.getAttribute("serviceId");
String username = database.getAttribute("username");
String password = database.getAttribute("password");
String host = url.substring(url.indexOf("//"), url.indexOf(";"));
String connectString = "jdbc:oracle:thin:#" + host + "/" + serviceId;
// Load JDBC Driver
String driverClass = "oracle.jdbc.driver.OracleDriver";
Class.forName(driverClass);
try {
conn = DriverManager.getConnection(connectString, username, password);
} catch (SQLException ex) {
throw new SQLException(ex);
} catch (Exception ex) {
throw new Exception(ex);
}
return conn;
}
public static void main(String[] args) throws URISyntaxException, IOException, SQLException {
String host = "https://rally1.rallydev.com";
String username = "username#abc.com";
String password = "password";
//String userRef = "";
String applicationName = "update team membership";
//int queryLimit = 4000;
Connection conn = null;
String propertiesFile = "";
propertiesFile = "c:/app/c/properties_prod.xml";
String projid = "";
String resid = "";
//String returnValue = "";
String selectString = "";
RallyRestApi restApi = new RallyRestApi(
new URI(host),
username,
password);
restApi.setApplicationName(applicationName);
System.out.println(restApi.getWsapiVersion());
try {
conn = makeConnection(propertiesFile);
// Select compared records of Team member present in table1 not in table2
selectString += "select Prj_name ";
selectString += ",res_name";
selectString += " from CUST_table1_v c ";
selectString += " WHERE NOT EXISTS( select 1 from CUST_table2_v r";
selectString += " where c.prj_name = r.Prj_name and c.res_name = r.res_name)";
// Create select statement
Statement st = (Statement) conn.createStatement();
// Execute select statement
ResultSet rs = st.executeQuery(selectString);
while (rs.next()) {
projid = rs.getString("Prj_name");
resid = "(" + rs.getString("res_name") + ")";
System.out.println(projid);
System.out.println(resid);
QueryRequest projectRequest = new QueryRequest("Project");
projectRequest.setFetch(new Fetch("Name"));
projectRequest.setQueryFilter(new QueryFilter("Name", "=", projid));
QueryResponse projectQueryResponse = restApi.query(projectRequest);
JsonObject projectObj = projectQueryResponse.getResults().get(0).getAsJsonObject();
QueryRequest userRequest = new QueryRequest("User");
userRequest.setFetch(new Fetch("UserPermissions", "TeamMemberships"));
userRequest.setQueryFilter(new QueryFilter("DisplayName", "contains", resid));
QueryResponse userQueryResponse = restApi.query(userRequest);
System.out.println(userQueryResponse);
JsonObject userObject = userQueryResponse.getResults().get(0).getAsJsonObject();
//JsonObject projectObj = new JsonObject(projid);
String userRef = userObject.get("_ref").toString();
System.out.println("Found User with Ref: " + userRef);
JsonArray existTeamMemberships = (JsonArray) userQueryResponse.getResults().get(0).getAsJsonObject().get("TeamMemberships");
// add or remove projects for user
existTeamMemberships.add(projectObj);
// Setup update fields/values for Team Membership
JsonObject updateUserTeamMembershipObj = new JsonObject();
updateUserTeamMembershipObj.add("TeamMemberships", existTeamMemberships);
UpdateRequest updateTeamMembershipsRequest = new UpdateRequest(userRef, updateUserTeamMembershipObj);
UpdateResponse updateTeamMembershipResponse = restApi.update(updateTeamMembershipsRequest);
}
} catch (Exception e) {
e.printStackTrace();
} finally {
restApi.close();
conn.close();
}
}
}
Following is the error out put
v2.0
DT-E2E Automation
(tmanjunath)
com.rallydev.rest.response.QueryResponse#193d23b
java.lang.IndexOutOfBoundsException: Index: 0, Size: 0
at java.util.ArrayList.rangeCheck(ArrayList.java:635)
at java.util.ArrayList.get(ArrayList.java:411)
at com.google.gson.JsonArray.get(JsonArray.java:92)
at teammembership.TeamMembership.main(TeamMembership.java:125)
BUILD SUCCESSFUL (total time: 11 seconds)
You have a List (an ArrayList to be exact) which contains nothing (no single object) and you try to access the first object (which doesn't exist). That's what the error tells you. You try to access index 0 (the first position in the list) but there is no element in it (so the size is 0). It happens around line 125. Since your formatting in the question doesn't seem to be correct, I can only guess which line in your question is line 125 (and I don't want to read 125 lines of code by the way). So I think the exception occurs here:
JsonObject userObject = userQueryResponse.getResults().get(0).getAsJsonObject();
Try to track it down. Make sure the list returned from userQueryResponse.getResults() contains something:
list = userQueryResponse.getResults();
System.out.println(list.size());
If not, that's your problem. If you cannot solve it, ask a specific question about this problem without posting 150 line of code.
get("_ref").toString() used to work with the older versions, and the code you refer to is older. When using 2.0.4 jar (which by default uses the most recent version of WS API in production, v2.0) replace all instances of it with get("_ref").getAsString().
For example,
String userRef = userObject.get("_ref").toString();
will generate java.lang.NullPointerException: key == null
I am making a web application project using JSP in Netbeans IDE.
I have a java Class called Login which has a static method called authenticate.When I am running this file it gives me the required output. Now I have a web page called auth.jsp which calls the method authenticate but when I try to run this web page the value returned by the method is "error" that is sql exception is being thrown by the method. Could someone please tell why this is happening? Thanks in advance.
package server;
import java.sql.*;
public class Login {
public static void main(String args[]) {
System.out.print(authenticate("260","abc"));
}
public static String authenticate(String username, String password) {
String auth="",pass="";
int blocked_status=0;
String url = "jdbc:mysql://localhost:3306/radio";
try{
Connection conn = DriverManager.getConnection(url,"root","rishabh");
Statement stmt = conn.createStatement();
String sql = "select password,blocked from user where username = \"" + username + "\"";
ResultSet rs = stmt.executeQuery(sql);
int flag=0;
while(rs.next()){
pass = rs.getString("password");
blocked_status = rs.getInt("blocked");
flag++;
}
if(flag>0) {
if(blocked_status==1)
auth = "blocked";
else if(pass.equals(password))
auth = "authenticated";
else if(pass.equalsIgnoreCase(pass))
auth = "wrong_case";
else
auth = "wrong_password";
}
else{
auth = "incorrect_username";
}
} catch(SQLException e){
auth = "sqlerror";
System.out.print(" ERROR " );
}
return auth;
}
}