无法使用java eclipse通过lambda函数将项插入dynamodb
我试图通过lambda函数将项目插入dynamodb。 我已经提供了创建iam角色和lambda函数所需的所有凭据。 但我的程序抛出以下异常
{
"errorMessage": "com/amazonaws/client/builder/AwsSyncClientBuilder",
"errorType": "java.lang.NoClassDefFoundError",
"stackTrace": [
"java.lang.ClassLoader.defineClass1(Native Method)",
"java.lang.ClassLoader.defineClass(ClassLoader.java:763)",
"java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)",
"java.net.URLClassLoader.defineClass(URLClassLoader.java:467)",
"java.net.URLClassLoader.access$100(URLClassLoader.java:73)",
"java.net.URLClassLoader$1.run(URLClassLoader.java:368)",
"java.net.URLClassLoader$1.run(URLClassLoader.java:362)",
"java.security.AccessController.doPrivileged(Native Method)",
"java.net.URLClassLoader.findClass(URLClassLoader.java:361)",
"java.lang.ClassLoader.loadClass(ClassLoader.java:424)",
"java.lang.ClassLoader.loadClass(ClassLoader.java:357)",
"com.bridgelabz.LambdaFunctionHandler.handleRequest(LambdaFunctionHandler.java:20)",
"com.bridgelabz.LambdaFunctionHandler.handleRequest(LambdaFunctionHandler.java:1)"
],
"cause": {
"errorMessage": "com.amazonaws.client.builder.AwsSyncClientBuilder",
"errorType": "java.lang.ClassNotFoundException",
"stackTrace": [
"java.net.URLClassLoader.findClass(URLClassLoader.java:381)",
"java.lang.ClassLoader.loadClass(ClassLoader.java:424)",
"java.lang.ClassLoader.loadClass(ClassLoader.java:357)",
"java.lang.ClassLoader.defineClass1(Native Method)",
"java.lang.ClassLoader.defineClass(ClassLoader.java:763)",
"java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)",
"java.net.URLClassLoader.defineClass(URLClassLoader.java:467)",
"java.net.URLClassLoader.access$100(URLClassLoader.java:73)",
"java.net.URLClassLoader$1.run(URLClassLoader.java:368)",
"java.net.URLClassLoader$1.run(URLClassLoader.java:362)",
"java.security.AccessController.doPrivileged(Native Method)",
"java.net.URLClassLoader.findClass(URLClassLoader.java:361)",
"java.lang.ClassLoader.loadClass(ClassLoader.java:424)",
"java.lang.ClassLoader.loadClass(ClassLoader.java:357)",
"com.bridgelabz.LambdaFunctionHandler.handleRequest(LambdaFunctionHandler.java:20)",
"com.bridgelabz.LambdaFunctionHandler.handleRequest(LambdaFunctionHandler.java:1)"
]
}
}
这是我的密码
package com.bridgelabz;
import com.amazonaws.regions.Regions;
import com.amazonaws.services.dynamodbv2.AmazonDynamoDB;
import com.amazonaws.services.dynamodbv2.AmazonDynamoDBClientBuilder;
import com.amazonaws.services.dynamodbv2.document.DynamoDB;
import com.amazonaws.services.dynamodbv2.document.Item;
import com.amazonaws.services.dynamodbv2.document.Table;
import com.amazonaws.services.lambda.runtime.Context;
import com.amazonaws.services.lambda.runtime.RequestHandler;
import com.amazonaws.services.lambda.runtime.events.DynamodbEvent;
public class LambdaFunctionHandler implements RequestHandler<DynamodbEvent, Object> {
@Override
public Object handleRequest(DynamodbEvent input, Context context) {
context.getLogger().log("Input: " + input);
AmazonDynamoDB client = AmazonDynamoDBClientBuilder.standard().withRegion(Regions.US_WEST_2).build();
DynamoDB dynamoDB = new DynamoDB(client);
String tableName = "AddNumbers";
Table table = dynamoDB.getTable(tableName);
Model model = new Model();
int uniqueId = model.getUniqueId();
int number1 = model.getNumber1();
int number2 = model.getNumber2();
int result = number1 + number2;
Item item = new Item().withPrimaryKey("uniqueId", uniqueId).withNumber("number1", number1)
.withNumber("number2", number2).withNumber("result1", result);
table.putItem(item);
return true;
}
}
还有我的模范班
package com.bridgelabz;
public class Model {
int uniqueId;
int number1;
int number2;
public int getUniqueId() {
return uniqueId;
}
public void setUniqueId(int uniqueId) {
this.uniqueId = uniqueId;
}
public int getNumber1() {
return number1;
}
public void setNumber1(int number1) {
this.number1 = number1;
}
public int getNumber2() {
return number2;
}
public void setNumber2(int number2) {
this.number2 = number2;
}
}
表格是在dynamodb中预先创建的。我似乎无法理解我做错了什么。请帮忙
# 1 楼答案
您是否使用AWS SDK Eclipse插件上传代码?还是你自己?(使用aws cli导出JAR和上载)
我编写了一个Java Lambda函数来接受一行,并将其输入DynamoDB;使用Eclipse导出将代码导出到JAR,并使用AWS cli将其上载到AWS,并获得NoClassDefError
如果我只有一个没有AWS SDK依赖项的简单函数,我就不会出现上述错误
然后我遇到了http://docs.aws.amazon.com/toolkit-for-eclipse/v1/user-guide//lambda-tutorial.html 并且了解到我可以使用Eclipse-AWSSDK插件直接上传代码
我尝试过这样做,现在我的函数成功运行了
我的试用代码中的一些代码片段