Tag: WebDev

I'm trying to push system logs into Grafana Loki by using OpenTelemetry Colelctor. I've encountered a problem where Loki is not able to properly index data, because it require attributes to be provided at Resource level. I have tried configuring groupbyattrs processor, but it seems not to have effect receivers: journald: ... processors: groupbyattrs: keys: - "service.name" - "service.namespace" - "host.name" exporters: otlphttp: ... service: pipelines: logs: receivers: - "journald" processors: - "groupbyattrs" exporters: - "otlphttp"

I have a simple Jersey application that is currently functional. I need to add the ability to send an email, so I'm using code from another functional application. This app uses the javax.mail package (we're still on an older version of Tomcat so we can't use jakarta.mail). I include the dependency in pom.xml like so: <dependency> <groupId>com.sun.mail</groupId> <artifactId>javax.mail</artifactId> <version>1.6.2</version> <scope>provided</scope> </dependency> For the moment I'm leaving out the mailer implementation code, because I believe that is irrelevant to this particular issue. I package the Java app, build a Docker image, then deploy it into our Kubernetes stack. When I access the API endpoint I get a log error: java.lang.NoClassDefFoundError: javax/mail/Address. This seems to

I just bought this device to program it via SPI. It has a PS pin, and I’m not sure what to do with it. Right now, I’ve connected MOSI, MISO, VDD (3.3V), GND, and CS, but I still cannot communicate with it. What should I do with the PS pin? Should I solder it to the L or H pad on the board, or connect it to GND or 3.3V? I see that there are two VCC pins and two GND pins. Do I need to connect both VCC pins to 3.3V and both GND pins to ground? The host is an nRF52. Below is the code I’m using to read the WHO_AM_I register. while (1) { LOG("1\r\n"); nrf_delay_ms(100); LOG("2\r\n"); nrf_delay_ms(100); LOG("3\r\n"); nrf_delay_ms(100); LOG("Reading WHO_AM_I register...\r\n"); //

I'm working on porting an Android application into Windows. The Android app uses some OpenGL code to create some widgets. I'm trying to port these over to my C# application, but I'm struggling to get it to work with the requirements I have: The Windows application needs to be based on WPF. The graphics code should be running in a thread separate to the UI thread. The elements need to have transparency, meaning that whatever WPF view is below the OpenGL element, needs to be visible through the transparent parts of the graphics drawing. I've tried working with SharpGL and OpenTK. I had threading issues with OpenTK and couldn't get SharpGL to show the WPF view below it, leading to the GL drawing always being fully opaque. I figured I'd ask to see if anyone has approached something like this before or has advice.

This is my current code, platx being the x coordinate for the platform, platy being the y coordinate, horiz_vel being x velocity of player and player_vel being y velocity etc. I have a feeling a list would help but I don't know how to get it to wrok, please can someone help ignore spelling mistakes in comments if there are any, I'm in a panic def player_move(self): self.x_pos += self.horiz_vel while self.x_pos <= self.platx and self.x_pos >= self.platx + self.plat_width: self.y_pos += self.player_vel self.falling = True if self.jumping: ### Jump movement self.y_pos -= self.player_vel self.jumpCount += 1 if self.jumpCount == self.max_jump: self.jumping = False self.falling = True elif self.falling: ###gravity if self.y_pos <= self.platy and self.y_pos + self.player_vel >= self.

I would like to retrieve private key from a certificate that I've created. Is it possible at all? Maybe I can specify some options during certificate creation for this. This is my attempt but I'm getting null instead of the key. using var rsa = RSA.Create(2048); var req = new CertificateRequest($"CN=Key storage {Guid.NewGuid()}", rsa, HashAlgorithmName.SHA256, RSASignaturePadding.Pkcs1); var keyStoringCert = req.CreateSelfSigned(DateTimeOffset.Now, DateTimeOffset.Now); using var store = new X509Store(StoreName.My, StoreLocation.LocalMachine); store.Open(OpenFlags.ReadWrite); store.Add(keyStoringCert); var publicKey = keyStoringCert.GetRSAPublicKey().ExportRSAPublicKeyPem(); foreach (var cert in store.Certificates) { var currPublicKey = cert.GetRSAPublicKey()?.ExportRSAPublicKeyPem(); if (publicKey == currPublicKey) { var currPrivateKey = cert.GetRSAPrivateKey(); // returns null } }

I have this dataset and I want to interpolate the value for column imp.cep.value based on the timeseries obs_value, applying the same growth rate or similar pattern. How should I do this? I tried model instruction without success. data <- tibble( geo = c("CY", "CY", "CY", "CY", "CY", "CY","CY","CY","CY","CY"), time = c(2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023), na_item = c("P1", "P1", "P1", "P1", "P1", "P1","P1","P1","P1","P1"), nace_r2 = rep("C", 10), ty = rep("TOT_EGSS", 10), unit = rep("MIO_EUR", 10), env_pa = rep("TOT_CEP", 10), imp.cep.value = c(NA, NA, NA, NA, 43.15, 87.85,NA, NA, NA, NA), obs_value = c(9.614127, 8.85574

I am currently experimenting with a DuckDB / Ducklake setup using postgres as a catalog. I am experimenting with a handful of concurrent writers and many concurrent readers. To reduce stress on the postgres backend, I'd like to use pgBouncer for connection pooling. I don't understand the ducklake extension well enough to judge what type of pooling to use. From what I can tell, every query is enclosed in its own transaction with repeatable read. Also, DuckDB is not using postgres sequences, instead it calculates keys locally and simply retries on conflict. From this it looks like transaction pooling would be fine, the limitation would be the growing conflicts with concurrent writers, leading to many retries. However, I also see some temporary tables which makes me question if transaction pooling is possible. Maybe someone has some deeper insights. Is it safe to use transaction pooling for the readers? Is it safe to use transaction pooling for the writers? T

I am looking for high-quality notes or revision resources for subjects like Data Structures & Algorithms (DSA), Computer Networks (CN), and Operating Systems (OS). I prefer material that is: concise and good for quick revision, commonly used for interviews or university exams, structured topic-wise. Free resources would be ideal.

The code goes like this... #include<stdio.h> #include<string.h> int main(int argc, char* argv[]){ char buf[128]; strcpy(buf, argv[1]); printf("Input:%s\n", buf); return 0; } So I ran this with a debugger, gdb. I did run $(python3 -c 'print("A"*300)') . This crashed the program with a segmentation fault (as expected), overwrites RBP but execution stops at leave (i.e. next instruction is ret), and therefore does not corrupt the RIP yet. However, when I ran it the second time with run $(python3 -c 'print("A"*136' + "P"*6) , it successfully overwrites RBP and manages to execute ret, consequently overwriting RIP too. Why does this happen? I have added a few screenshots to help put a visualization to this. Example 1. In this example 1, I ran run $(python3 -c 'print("