I défini ma fonction lambda comme ça et téléchargé sur Amazon:Fonction d'appel AWS lambda avec le type d'entrée de classe interne
@Override
public String handleRequest(Request input, Context context) {
String template = "%s ${greeting}";
StrSubstitutor ss = new StrSubstitutor(input.replaceables);
String inputted = String.format(template, input.rawValues[0]);
return ss.replace(inputted);
}
La définition de classe de demande (classe intérieure):
public class Request {
String[] rawValues;
HashMap<String, String> replaceables;
public Request(){
replaceables = new HashMap<String, String>();
}
//...getter and setters
}
Appelez-le ensuite boto3 et obtenez la réponse suivante:
>>> client = boto3.client('lambda', 'us-west-2')
>>> resp = client.invoke(FunctionName='myfunction', InvocationType='RequestResponse', Payload="""{"rawValues": ["jero"], "replaceables": {"greeting": "world"}}""")
>>> resp['Payload'].read()
'{"errorMessage":"An error occurred during JSON parsing","errorType":"java.lang.RuntimeException","stackTrace":[],"cause":{"errorMessage":"com.fasterxml.jackson.databind.JsonMappingException: No suitable constructor found for type [simple type, class mypackage.functions.Demo$Request]: can not instantiate from JSON object (missing default constructor or creator, or perhaps need to add/enable type information?)\\n at [Source: [email protected]; line: 1, column: 2]","errorType":"java.io.UncheckedIOException","stackTrace":[],"cause":{"errorMessage":"No suitable constructor found for type [simple type, class mypackage.functions.Demo$Request]: can not instantiate from JSON object (missing default constructor or creator, or perhaps need to add/enable type information?)\\n at [Source: [email protected]; line: 1, column: 2]","errorType":"com.fasterxml.jackson.databind.JsonMappingException","stackTrace":["com.fasterxml.jackson.databind.JsonMappingException.from(JsonMappingException.java:148)","com.fasterxml.jackson.databind.deser.BeanDeserializerBase.deserializeFromObjectUsingNonDefault(BeanDeserializerBase.java:1080)","com.fasterxml.jackson.databind.deser.BeanDeserializer.deserializeFromObject(BeanDeserializer.java:295)","com.fasterxml.jackson.databind.deser.BeanDeserializer.deserialize(BeanDeserializer.java:142)","com.fasterxml.jackson.databind.ObjectReader._bindAndClose(ObjectReader.java:1441)","com.fasterxml.jackson.databind.ObjectReader.readValue(ObjectReader.java:1047)"]}}}'
Erreur complète comme indiqué lors du test dans la console amazon:
"cause": {
"errorMessage": "No suitable constructor found for type [simple type, class mypackage.functions.Demo$Request]: can not instantiate from JSON object (missing default constructor or creator, or perhaps need to add/enable type information?)\n at [Source: [email protected]; line: 1, column: 4]",
"errorType": "com.fasterxml.jackson.databind.JsonMappingException",
"stackTrace": [
"com.fasterxml.jackson.databind.JsonMappingException.from(JsonMappingException.java:148)",
"com.fasterxml.jackson.databind.deser.BeanDeserializerBase.deserializeFromObjectUsingNonDefault(BeanDeserializerBase.java:1080)",
"com.fasterxml.jackson.databind.deser.BeanDeserializer.deserializeFromObject(BeanDeserializer.java:295)",
"com.fasterxml.jackson.databind.deser.BeanDeserializer.deserialize(BeanDeserializer.java:142)",
"com.fasterxml.jackson.databind.ObjectReader._bindAndClose(ObjectReader.java:1441)",
"com.fasterxml.jackson.databind.ObjectReader.readValue(ObjectReader.java:1047)"
]
}
Donc, l'erreur principale retourné me fait penser qu'il ya un problème avec ma demande Définition de classe qui définit essentiellement le destinataire pour un délinéarisé JSON """{"rawValues": ["jero"], "replaceable": {"greeting": "world"}}"""
. Dans le documentation, il est indiqué que le type de carte java est pris en charge en tant que type d'entrée, mais je ne peux pas obtenir ce travail. Connaissez-vous un exemple de fonction java mappant des dictionnaires JSON avec Java Maps?