A Lambda wrapper of LanguageTool.
Limit set to max 1024 character texts. (com.isahb.slsspellchecker.Handler.CHARACTER_LIMIT)
The sample uses AmericanEnglish but others can be included easily by adding the necessary dependency in the pom.xml, for example for German language spoken in Germany:
<dependency>
<groupId>org.languagetool</groupId>
<artifactId>language-de</artifactId>
<version>4.8</version>
</dependency>
In the Handler:
private JLanguageTool langTool = new JLanguageTool(new GermanyGerman());
Serverless Framework is used for deployment and an API Gateway stack with checkSpelling resource is created.
To build:
mvn clean install
To deploy with Servlerless Framework in Frankfurt region:
sls deploy --region eu-central-1
CURL (replace api-gateway-id with your generated id after stack is deployed)
curl --location --request POST 'https://[api-gateway-id].execute-api.eu-central-1.amazonaws.com/dev/checkSpelling' \ --header 'Content-Type: application/json' \ --data-raw '{ "text": "Please not that this sentence has erors" }'
** Request/Response format**
{
"text": "Please not that this sentence has erors"
}
{
"error": null,
"spellCheckSuggestions": [
{
"startPos": 7,
"endPos": 10,
"message": "Did you mean <suggestion>note</suggestion>?",
"shortMessage": "Possible typo",
"type": "Other",
"suggestedReplacements": [
"note"
],
"suggestionMeta": {
"categoryId": "TYPOS",
"categoryName": "Possible Typo",
"correctExamples": [],
"incorrectExamples": [
{
"example": "Please <marker>not</marker> that saying “Open Source” does not mean very much.",
"corrections": [
"note"
]
}
]
}
},
{
"startPos": 34,
"endPos": 39,
"message": "Possible spelling mistake found.",
"shortMessage": "Spelling mistake",
"type": "Other",
"suggestedReplacements": [
"errors",
"Eros",
"errs"
],
"suggestionMeta": {
"categoryId": "TYPOS",
"categoryName": "Possible Typo",
"correctExamples": [
{
"example": "This <marker>sentence</marker> contains a spelling mistake."
}
],
"incorrectExamples": [
{
"example": "This <marker>sentenc</marker> contains a spelling mistake.",
"corrections": [
"sentence"
]
}
]
}
}
]
}
American English tests
Cold starts for American English with a 2GB configuration take up to 10s.
A warm lambda takes a few hundred milliseconds but never under 200 milliseconds in my tests.