serkan-ozal

serkan-ozal

Runner	OS	Processor (CPU)	Memory (RAM)
ubuntu-latest	Ubuntu - 22.04	- Model: Intel Xeon E5-2673 v4 @ 2.30GHz - # of cores: 2	7 GB
windows-latest	Windows - 2022	- Model: Xeon® Platinum 8272CL - # of cores: 2	7 GB
macos-latest	MacOS - 12	- Model: Intel Xeon E5-1650 v2 @ 3.50GHz - # of cores: 3	14 GB

serkan-ozal

const AWS = require('aws-sdk');
const dynamodb = new AWS.DynamoDB();

exports.hello = async (event, context) => {
  const promises = [];
  for (let i = 0; i < 1000; i++) {
    const params = {
        TableName: 'books',
        Item: {
            'id': {S: i.toString()},

serkan-ozal

import com.fasterxml.jackson.annotation.JsonInclude;
import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.core.JsonStreamContext;
import com.fasterxml.jackson.databind.*;
import com.fasterxml.jackson.databind.module.SimpleModule;
import com.fasterxml.jackson.databind.ser.BeanSerializerModifier;
import com.fasterxml.jackson.databind.ser.PropertyWriter;
import com.fasterxml.jackson.databind.ser.impl.SimpleBeanPropertyFilter;
import com.fasterxml.jackson.databind.ser.impl.SimpleFilterProvider;
import com.fasterxml.jackson.databind.type.*;

serkan-ozal

How to setup AWS lambda function to talk to the internet and VPC

I'm going to walk you through the steps for setting up a AWS Lambda to talk to the internet and a VPC. Let's dive in.

So it might be really unintuitive at first but lambda functions have three states.

1. No VPC, where it can talk openly to the web, but can't talk to any of your AWS services.
2. VPC, the default setting where the lambda function can talk to your AWS services but can't talk to the web.
3. VPC with NAT, The best of both worlds, AWS services and web.

serkan-ozal

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.lang.instrument.ClassFileTransformer;
import java.lang.instrument.IllegalClassFormatException;
import java.lang.reflect.Field;
import java.net.URL;
import java.net.URLClassLoader;
import java.util.Enumeration;
import java.util.List;

serkan-ozal

[StoreStore]
<volatile_store>
[StoreLoad]

<volatile_load>
[LoadLoad|LoadStore]

serkan-ozal

{
  "env": [
    "+ env",
    "AWS_LAMBDA_FUNCTION_VERSION=$LATEST",
    "AWS_SESSION_TOKEN=**************",
    "AWS_LAMBDA_LOG_GROUP_NAME=/aws/lambda/lb_runCommand",
    "LAMBDA_TASK_ROOT=/var/task",
    "LD_LIBRARY_PATH=/lib64:/usr/lib64:/var/runtime:/var/runtime/lib:/var/task:/var/task/lib",
    "AWS_LAMBDA_LOG_STREAM_NAME=2017/01/06/[$LATEST]8d6559c688e44b7fa175393949f6c4b2",
    "NLSPATH=/usr/dt/lib/nls/msg/%L/%N.cat",

serkan-ozal

import java.lang.reflect.Field;

import sun.misc.Unsafe;
import javassist.ClassPool;
import javassist.CtClass;

public class ClassCopyDemo {

    /*
         <!-- Javassist dependency -->

serkan-ozal

    private static class SingleInstanceProviderWithSingleInstanceCreationGuaranteeByCAS 
            implements SingleInstanceProvider {

        private static final long INSTANCE_WRAPPER_OFFSET; 
        
        static {
            try {
                INSTANCE_WRAPPER_OFFSET = 
                        UNSAFE.objectFieldOffset(
                            SingleInstanceProviderWithSingleInstanceCreationGuaranteeByCAS.class.