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Commit f1feef9

Browse files
author
SJAsus
committed
Added a Base HTTP Handler and a Demo Implementation with Dependency
Injection
1 parent 7939762 commit f1feef9

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11 files changed

+371
-15
lines changed

11 files changed

+371
-15
lines changed
Lines changed: 47 additions & 14 deletions
Original file line numberDiff line numberDiff line change
@@ -1,22 +1,29 @@
11
/**
2-
* Copyright 2017. All Rights Reserved.
2+
* Copyright 2017 shalabh.us
33
*
4-
* NOTICE: All information contained herein is, and remains
5-
* the property of shalabh.us. The intellectual and technical
6-
* concepts contained herein are proprietary to shalabh.us
7-
* and may be covered by U.S. and Foreign Patents,
8-
* patents in process, and are protected by trade secret or copyright law.
9-
* Dissemination of this information or reproduction of this material
10-
* is strictly forbidden unless prior written permission is obtained
11-
* from shalabh.us
4+
*
5+
* Licensed under the Apache License, Version 2.0 (the "License");
6+
* you may not use this file except in compliance with the License.
7+
* You may obtain a copy of the License at
8+
*
9+
* http://www.apache.org/licenses/LICENSE-2.0
10+
*
11+
* Unless required by applicable law or agreed to in writing, software
12+
* distributed under the License is distributed on an "AS IS" BASIS,
13+
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14+
* See the License for the specific language governing permissions and
15+
* limitations under the License.
1216
*/
1317
package us.shalabh.alp.client;
1418

1519
import java.io.IOException;
1620

1721
import com.amazonaws.services.lambda.runtime.events.S3Event;
1822

23+
import us.shalabh.alp.function.DemoHttpRequestLambda;
1924
import us.shalabh.alp.function.DemoS3EventLambda;
25+
import us.shalabh.alp.model.HttpRequest;
26+
import us.shalabh.alp.model.HttpResponse;
2027

2128
/**
2229
* Just invokes the Demo Lambda Handlers
@@ -26,32 +33,58 @@
2633
public class SimpleAWSLambdaSimulator
2734
{
2835
/**
29-
* psvm
36+
* psvm
3037
*
3138
* @param args
3239
*/
3340
public static void main(String args[])
3441
{
3542
try
3643
{
37-
invokeDemoS3EventLambda();
44+
switch (args[0])
45+
{
46+
case "S3_EVENT":
47+
invokeDemoS3EventLambda();
48+
break;
49+
case "HTTP_REQUEST":
50+
invokeDemoHttpRequestLambda();
51+
break;
52+
default:
53+
break;
54+
}
55+
3856
}
3957
catch (Throwable t)
4058
{
4159
// something went wrong
4260
t.printStackTrace();
4361
}
4462
}
45-
63+
4664
/**
47-
* Simulate the lambda being invoked.
65+
* Simulate the lambda being invoked.
4866
*
4967
* @throws IOException
5068
*/
5169
private static void invokeDemoS3EventLambda() throws IOException
52-
{
70+
{
5371
// invoke the lambda
5472
DemoS3EventLambda lambda = new DemoS3EventLambda();
5573
lambda.handleRequest(new S3Event(null), new ClientTestContext());
5674
}
75+
76+
/**
77+
* Simulate the HTTP Request lambda being invoked.
78+
*
79+
* @throws IOException
80+
*/
81+
private static void invokeDemoHttpRequestLambda() throws IOException
82+
{
83+
// invoke the lambda
84+
DemoHttpRequestLambda lambda = new DemoHttpRequestLambda();
85+
HttpResponse response = lambda.handleRequest(new HttpRequest(), new ClientTestContext());
86+
87+
System.out.println(response.getBody());
88+
}
89+
5790
}

‎src/main/java/us/shalabh/alp/config/AppComponent.java

Lines changed: 8 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -17,6 +17,7 @@
1717
import com.amazonaws.services.s3.AmazonS3;
1818

1919
import dagger.Component;
20+
import us.shalabh.alp.service.DemoHttpRequestService;
2021
import us.shalabh.alp.service.DemoS3EventService;
2122

2223
/**
@@ -42,4 +43,11 @@ public interface AppComponent
4243
* @return
4344
*/
4445
DemoS3EventService getDemoS3EventService();
46+
47+
/**
48+
* gets DemoHttpRequestService object
49+
*
50+
* @return
51+
*/
52+
DemoHttpRequestService getDemoHttpRequestService();
4553
}

‎src/main/java/us/shalabh/alp/config/AppModule.java

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Original file line numberDiff line numberDiff line change
@@ -17,9 +17,13 @@
1717

1818
import dagger.Module;
1919
import dagger.Provides;
20+
import us.shalabh.alp.dao.DemoHttpRequestDao;
2021
import us.shalabh.alp.dao.DemoS3EventDao;
22+
import us.shalabh.alp.dao.IDemoHttpRequestDao;
2123
import us.shalabh.alp.dao.IDemoS3EventDao;
24+
import us.shalabh.alp.service.DemoHttpRequestService;
2225
import us.shalabh.alp.service.DemoS3EventService;
26+
import us.shalabh.alp.service.IDemoHttpRequestService;
2327
import us.shalabh.alp.service.IDemoS3EventService;
2428

2529
/**
@@ -64,4 +68,28 @@ public IDemoS3EventDao provideDemoS3EventDao(DemoS3EventDao demoS3EventDao)
6468
{
6569
return demoS3EventDao;
6670
}
71+
72+
/**
73+
* Provides an implementation of an <code>IDemoHttpRequestDao</code>
74+
*
75+
* @param demoHttpRequestDao
76+
* @return
77+
*/
78+
@Provides
79+
public IDemoHttpRequestDao provideDemoHttpRequestDao(DemoHttpRequestDao demoHttpRequestDao)
80+
{
81+
return demoHttpRequestDao;
82+
}
83+
84+
/**
85+
* Provides an implementation of an <code>IDemoHttpRequestService</code>
86+
*
87+
* @param demoHttpRequestService
88+
* @return
89+
*/
90+
@Provides
91+
public IDemoHttpRequestService provideDemoHttpRequestService(DemoHttpRequestService demoHttpRequestService)
92+
{
93+
return demoHttpRequestService;
94+
}
6795
}
Lines changed: 44 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,44 @@
1+
/**
2+
* Copyright 2017. All Rights Reserved.
3+
*
4+
* NOTICE: All information contained herein is, and remains
5+
* the property of shalabh.us. The intellectual and technical
6+
* concepts contained herein are proprietary to shalabh.us
7+
* and may be covered by U.S. and Foreign Patents,
8+
* patents in process, and are protected by trade secret or copyright law.
9+
* Dissemination of this information or reproduction of this material
10+
* is strictly forbidden unless prior written permission is obtained
11+
* from shalabh.us
12+
*/
13+
package us.shalabh.alp.dao;
14+
15+
import javax.inject.Inject;
16+
import javax.inject.Singleton;
17+
18+
/**
19+
* Gets data from a data source for eg. DynamoDB
20+
*
21+
* @author Shalabh Jaiswal
22+
*/
23+
@Singleton
24+
public class DemoHttpRequestDao implements IDemoHttpRequestDao
25+
{
26+
/**
27+
* default constructor
28+
*/
29+
@Inject
30+
public DemoHttpRequestDao()
31+
{
32+
// do nothing.
33+
}
34+
35+
/* (non-Javadoc)
36+
* @see us.shalabh.alp.dao.IDemoHttpRequestDao#getData()
37+
*/
38+
@Override
39+
public String getData()
40+
{
41+
return "Data for the HTTP Request";
42+
}
43+
44+
}
Lines changed: 28 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,28 @@
1+
/**
2+
* Copyright 2017. All Rights Reserved.
3+
*
4+
* NOTICE: All information contained herein is, and remains
5+
* the property of shalabh.us. The intellectual and technical
6+
* concepts contained herein are proprietary to shalabh.us
7+
* and may be covered by U.S. and Foreign Patents,
8+
* patents in process, and are protected by trade secret or copyright law.
9+
* Dissemination of this information or reproduction of this material
10+
* is strictly forbidden unless prior written permission is obtained
11+
* from shalabh.us
12+
*/
13+
package us.shalabh.alp.dao;
14+
15+
/**
16+
* DAO class
17+
*
18+
* @author Shalabh Jaiswal
19+
*/
20+
public interface IDemoHttpRequestDao
21+
{
22+
/**
23+
* Gets data from the data source
24+
*
25+
* @return
26+
*/
27+
public String getData();
28+
}
Lines changed: 56 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,56 @@
1+
/**
2+
* Copyright 2017. All Rights Reserved.
3+
*
4+
* NOTICE: All information contained herein is, and remains
5+
* the property of shalabh.us. The intellectual and technical
6+
* concepts contained herein are proprietary to shalabh.us
7+
* and may be covered by U.S. and Foreign Patents,
8+
* patents in process, and are protected by trade secret or copyright law.
9+
* Dissemination of this information or reproduction of this material
10+
* is strictly forbidden unless prior written permission is obtained
11+
* from shalabh.us
12+
*/
13+
package us.shalabh.alp.function;
14+
15+
import javax.inject.Inject;
16+
17+
import com.amazonaws.services.lambda.runtime.Context;
18+
19+
import us.shalabh.alp.model.HttpRequest;
20+
import us.shalabh.alp.model.HttpResponse;
21+
import us.shalabh.alp.service.IDemoHttpRequestService;
22+
23+
/**
24+
* Demo Lambda to handle Http Requests via API Gateway.
25+
*
26+
* @author Shalabh Jaiswal
27+
*/
28+
public class DemoHttpRequestLambda extends HttpBaseHandler
29+
{
30+
// service class
31+
@Inject
32+
IDemoHttpRequestService demoHttpRequestService;
33+
34+
/* (non-Javadoc)
35+
* @see us.shalabh.alp.function.HttpBaseHandler#init()
36+
*/
37+
@Override
38+
protected void init()
39+
{
40+
demoHttpRequestService = appComponent.getDemoHttpRequestService();
41+
}
42+
43+
/* (non-Javadoc)
44+
* @see us.shalabh.alp.function.HttpBaseHandler#process(us.shalabh.alp.model.HttpRequest, us.shalabh.alp.model.HttpResponse, com.amazonaws.services.lambda.runtime.Context)
45+
*/
46+
@Override
47+
protected HttpResponse process(HttpRequest request, HttpResponse response, Context context)
48+
{
49+
// json created by hand.
50+
String body = "{\"data\":\"" +demoHttpRequestService.getData() +"\"}";
51+
response.setBody(body);
52+
53+
return response;
54+
}
55+
56+
}

‎src/main/java/us/shalabh/alp/function/HttpBaseHandler.java

Lines changed: 5 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -15,6 +15,8 @@
1515
import com.amazonaws.services.lambda.runtime.Context;
1616
import com.amazonaws.services.lambda.runtime.RequestHandler;
1717

18+
import us.shalabh.alp.config.AppComponent;
19+
import us.shalabh.alp.config.DaggerAppComponent;
1820
import us.shalabh.alp.exception.AccessDeniedException;
1921
import us.shalabh.alp.model.HttpRequest;
2022
import us.shalabh.alp.model.HttpResponse;
@@ -30,7 +32,9 @@
3032
*/
3133
public abstract class HttpBaseHandler implements RequestHandler<HttpRequest, HttpResponse>
3234
{
33-
35+
// dagger app component
36+
static final AppComponent appComponent = DaggerAppComponent.builder().build();
37+
3438
/**
3539
* initialization code. used for setting up dependencies.
3640
*/
Lines changed: 48 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,48 @@
1+
/**
2+
* Copyright 2017. All Rights Reserved.
3+
*
4+
* NOTICE: All information contained herein is, and remains
5+
* the property of shalabh.us. The intellectual and technical
6+
* concepts contained herein are proprietary to shalabh.us
7+
* and may be covered by U.S. and Foreign Patents,
8+
* patents in process, and are protected by trade secret or copyright law.
9+
* Dissemination of this information or reproduction of this material
10+
* is strictly forbidden unless prior written permission is obtained
11+
* from shalabh.us
12+
*/
13+
package us.shalabh.alp.service;
14+
15+
import javax.inject.Inject;
16+
import javax.inject.Singleton;
17+
18+
import us.shalabh.alp.dao.IDemoHttpRequestDao;
19+
20+
/**
21+
* Service Class Implementation
22+
*
23+
* @author Shalabh Jaiswal
24+
*/
25+
@Singleton
26+
public class DemoHttpRequestService implements IDemoHttpRequestService
27+
{
28+
private IDemoHttpRequestDao demoHttpRequestDao;
29+
30+
/**
31+
* contructor injection
32+
*/
33+
@Inject
34+
public DemoHttpRequestService(IDemoHttpRequestDao demoHttpRequestDao)
35+
{
36+
this.demoHttpRequestDao = demoHttpRequestDao;
37+
}
38+
39+
/* (non-Javadoc)
40+
* @see us.shalabh.alp.service.IDemoHttpRequestService#getData()
41+
*/
42+
@Override
43+
public String getData()
44+
{
45+
return demoHttpRequestDao.getData();
46+
}
47+
48+
}
Lines changed: 28 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,28 @@
1+
/**
2+
* Copyright 2017. All Rights Reserved.
3+
*
4+
* NOTICE: All information contained herein is, and remains
5+
* the property of shalabh.us. The intellectual and technical
6+
* concepts contained herein are proprietary to shalabh.us
7+
* and may be covered by U.S. and Foreign Patents,
8+
* patents in process, and are protected by trade secret or copyright law.
9+
* Dissemination of this information or reproduction of this material
10+
* is strictly forbidden unless prior written permission is obtained
11+
* from shalabh.us
12+
*/
13+
package us.shalabh.alp.service;
14+
15+
/**
16+
* Service class
17+
*
18+
* @author Shalabh Jaiswal
19+
*/
20+
public interface IDemoHttpRequestService
21+
{
22+
/**
23+
* gets data from data source
24+
*
25+
* @return
26+
*/
27+
public String getData();
28+
}

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