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git commit --amend --date=now

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mvn versions:display-property-updates

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# For a property in a Spring component like this:
#
# @Value("${property.name}")
# private List<String> values;
#
# Spring will fail to start up with a vague error saying something like
# "Could not resolve placeholder 'property.name' in value "${property.name}"
# even though the property definition is right there in the yaml file

# For example, ordinarily in a yaml file something like this:

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db.collectionName.find(
  {
    $and: [
      {"timestamp": {$gte: ISODate('2021-10-05T00:00:00.000Z')}},
      {"timestamp": {$lt: ISODate('2021-10-06T00:00:00.000Z')}}
    ]
  }
)

db.collectionName.count(

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// Sequence number begins zero
db.collectionName.find({
  "sequenceNumber": { $regex: /^0/ }
})

// Sequence number ends zero
db.collectionName.find({
  "sequenceNumber": { $regex: /0$/ }
})

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db.currentCollectionName.renameCollection("newCollectionName")

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# Example using "jq" to pretty print JSON, displayed in less, preserving colour codes
curl -s http://localhost:8080/api/transfer/export  | jq -C . | less -R

# Example using "gunzip", using "-c" with gunzip to keep the original file
gunzip -c filename.json/gz | jq -C . | less -R

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import lombok.extern.slf4j.Slf4j;
import org.springframework.boot.web.error.ErrorAttributeOptions;
import org.springframework.boot.web.reactive.error.DefaultErrorAttributes;
import org.springframework.stereotype.Component;
import org.springframework.web.reactive.function.server.ServerRequest;

import java.lang.reflect.Method;
import java.util.Arrays;
import java.util.Map;

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import lombok.extern.slf4j.Slf4j;
import org.springframework.boot.autoconfigure.web.ResourceProperties;
import org.springframework.boot.autoconfigure.web.reactive.error.AbstractErrorWebExceptionHandler;
import org.springframework.boot.web.reactive.error.ErrorAttributes;
import org.springframework.context.ApplicationContext;
import org.springframework.core.annotation.Order;
import org.springframework.core.io.ClassPathResource;
import org.springframework.http.HttpMethod;
import org.springframework.http.HttpStatus;
import org.springframework.http.MediaType;

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import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.springframework.core.io.buffer.DataBuffer;
import org.springframework.core.io.buffer.DataBufferUtils;
import org.springframework.core.io.buffer.DefaultDataBufferFactory;
import reactor.core.publisher.Flux;
import reactor.core.publisher.Mono;

import java.io.BufferedWriter;
import java.io.FileWriter;