TEAMMEME_INFRA_HOUR3

INSTRUCTIONS.txt

@@ -0,0 +1,157 @@
+# 
+# 
+# Working in a fresh Ubuntu 16.04 AWS cloud environment. 
+# https://console.aws.amazon.com/ec2/v2/home?region=us-east-1#Instances:sort=instanceId
+# NOTE: CHECK IN ADVANCE THE STACK TRACE AT THE END OF THIS DOCUMENT. 
+# 
+# This may help you, "...pem" might be the path to your PEM file if it's not in ~/.ssh/. "-R" is to enable rsub/rmate with sublime, but you may want the first ssh option. 
+# ssh ubuntu@ec2-52-91-103-145.compute-1.amazonaws.com
+# ssh -i ...pem ubuntu@ec2-52-91-103-145.compute-1.amazonaws.com
+# ssh -R 52698:localhost:52698 -i ...pem ubuntu@ec2-52-91-103-145.compute-1.amazonaws.com
+# 
+# 
+sudo apt install docker
+sudo apt update
+sudo apt-get install     apt-transport-https     ca-certificates     curl     software-properties-common
+curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
+sudo apt-key fingerprint 0EBFCD88
+uname -r
+sudo add-apt-repository    "deb [arch=amd64] https://download.docker.com/linux/ubuntu \
+   $(lsb_release -cs) \
+   stable"
+sudo apt update
+sudo apt-get install docker-ce
+sudo docker run hello-world
+mkdir ~/Documents
+mkdir ~/Documents/wilau2/
+cd ~/Documents/wilau2/
+git clone https://github.com/guillaume-chevalier/cs-games-2018-relay-cloud
+ls
+cd cs-games-2018-relay-cloud/
+git status
+ls
+# rsub gradle.bat
+# sudo wget -O /usr/local/bin/rsub https://raw.github.com/aurora/rmate/master/rmate
+# sudo chmod +x /usr/local/bin/rsub
+# rsub gradle.bat
+# cat gradle.bat
+# ls
+./gradlew clean build
+java --version
+java -version
+ls /usr/lib/jvm/open-jdk
+ls /usr/lib/jvm/
+ls /usr/lib/
+sudo apt install default-jre default-jdk
+# Not installed from here, possible to for java8:
+# sudo add-apt-repository ppa:webupd8team/java
+# sudo apt update
+# sudo apt-get install oracle-java8-installer
+./gradlew clean build
+docker pull redis:4.0.8-alpine
+sudo -H docker pull redis:4.0.8-alpine
+screen -L
+# This was done in screen session: 
+# sudo -H docker run --name redis -p 6379:6379 redis:4.0.8-alpine
+# sudo docker run redis:4.0.8-alpine
+# CTRL+A+D to exit screen session
+ls config-server/src/main/resources
+cat config-server/src/main/resources/application.yml
+screen -L 
+# In the screen session, run this and then CTRL+A+D to exit softly: 
+# ./gradlew :config-server:bootRun -Dspring.profiles.active=native
+# Now, back outside screen:
+curl -L http://configUser:configPassword@localhost:8888/config/eureka-server.yml -o eureka-server.yml
+cat eureka-server.yml
+# git add eureka-server.yml
+# You should see "eureka:" and a few lines, I think. There is a meme under this car. 
+screen -L 
+# Yet another screen session in parallel to others, do this then CTRL+A+D: 
+# ./gradlew :eureka-server:bootRun -Dspring.profiles.active=native
+curl -L http://discUser:discPassword@localhost:8082/eureka/apps -o test2.txt
+
+
+# NOTE: FROM THIS POINT ON, MY SERVER FROZE AND I NEEDED A RESTART. HERE IS THE RECUPERATED STACK TRACE FROM SCREEN SESSION: 
+# HERE IS STACK TRACE: 
+
+#     $ tail -100 screenlog.0 
+#             at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188) ~[na:1.8.0_151]
+#             a<=========----> 75% EXECUTING [3m 42s]
+#              > :eureka-server:bootRun
+#              ksSocketImpl.java:392) ~[na:1.8.0_151]
+#             at java.net.Socket.connect(Socket.java:589) ~[na:1.8.0_151]
+#             at <=========----> 75% EX<=========----        at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:144) ~[httpclient-4.5.5.jar:4.5.5]
+#             at org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:134) ~[httpclient-4.5.5.jar:4.5.5]lient-4.5.5.jar:4.5.5]
+#             at org.apache.http.impl.client.DefaultRequestDirector.tryConnect(DefaultRequestDirector.java:610) ~[httpclient-4.5.5.jar:4.5.5]
+#             at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:445) ~[httpclient-4.5.5.jar:4.5.5]
+#             at org.apache.http.impl.client.AbstractHttpClient.doExecute(AbstractHttpClient.java:835) ~[httpclient-4.5.5.jar:4.5.5]
+#         <=========[0;3<=========----> 75% EXECUTING [3m 52s]t.execute(CloseableHttpClient.java:118) ~[httpclient-4.5.5.jar:4.5.5]
+#     <===> :config-serve> :eureka-server:bootRun
+#     <==B======        at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:56) ~[httpclient-4.5.5.jar:4.5.5]
+#             at com.sun.jersey.client.apache4.ApacheHttpClient4Handler.handle(ApacheHttpClient4Handler.java:173) ~[jersey-apache-client4-1.19.1.jar:1.19.1]
+#             ... 27 common frames omitted
+#     
+#     2018-03-24 18:37:59.661  WARN 12223 --- [nfoReplicator-0] c.n.d.s.t.d.RetryableEurekaHttpClient    : Request execution failed with message: java.net.ConnectException: Connection refused (Connection refused)
+#     2018-0<=========----> 75% EXECUTING [4m 3s]
+#     2018-03-24 18:38:01.043 ERROR 12223 --- [scoveryClient-0] c.netflix.discovery.TimedSupervisorTask  : task supervisor timed out
+#     
+#     java.util.concurrent.TimeoutException: null
+#             at java.util.concurrent.FutureTask.get(FutureTask.java:205) [na:1.8.0_151]
+#             at com.netflix.discovery.TimedSupervisorTask.run(TimedSupervisorTask.java:63) ~[eureka-client-1.7.0.jar:1.7.0]
+#             at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [na:1.8.0_151]
+#             at java.util.concurrent.FutureTask.run(FutureTask.java:266) [na:1.8.0_151]
+#             at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180) [na:1.8.0_151]
+#             at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293) [na:1.8.0_151]
+#             at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [na:1.8.0_151]
+#             at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [na:1.8.0_151]
+#             at java.lang.Thread.run(Thread.java:748) [na:1.8.0_151]
+#     
+#     2018-03-24 18:38:01.030  WARN 12223 --- [nfoReplicator-0] com.netflix.discovery.DiscoveryClient    : DiscoveryClient_CONFIG-SERVER/ip-172-31-53-96.ec2.internal:config-server:8888 - registration failed Cannot execute request on any known server
+#     
+#     com.netflix.discovery.shared.transport.TransportException: Cannot execute request on any known server
+#             at com.netflix.discovery.shared.transport.decorator.RetryableEurekaHttpClient.execute(RetryableEurekaHttpClient.java:111) ~[eureka-client-1.7.0.jar:1.7.0]
+#             at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.register(EurekaHttpClientDecorator.java:56) ~[eureka-client-1.7.0.jar:1.7.0]
+#             at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$1.execute(EurekaHttpClientDecorator.java:59) ~[eureka-client-1.7.0.jar:1.7.0]
+#             at com.netflix.discovery.shared.transport.decorator.SessionedEurekaHttpClient.execute(SessionedEurekaHttpClient.java:77) ~[eureka-client-1.7.0.jar:1.7.0]
+#             at        at com.netflix.discovery.InstanceInfoReplicator.run(InstanceInfoReplicator.java:104) [eureka-client-1.7.0.jar:1.7.0]reka-client-1.7.0.jar:1.7.0]
+#             at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [na:1.8.0_151]nt-1.7.0.jar:1.7.0]
+#             at java.util.concurrent.FutureTask.run(FutureTask.java:266) [na:1.8.0_151]
+#             at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180) [na:1.8.0_151]
+#             at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293) [na:1.8.0_151]
+#             at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [na:1.8.0_151]
+#             at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [na:1.8.0_151]
+#             at java.lang.Thread.run(Thread.java:748) [na:1.8.0_151]
+#     
+#     2018-03-24 18:38:01.030 ERROR 12223 --- [tbeatExecutor-0] com.netflix.discovery.DiscoveryClient    : DiscoveryClient_CONFIG-SERVER/ip-172-31-53-96.ec2.internal:config-server:8888 - was unable to send heartbeat!
+#     
+#     com.netflix.discovery.shared.transport.TransportException: Cannot execute request on any known server
+#             at com.netflix.discovery.shared.transport.decorator.RetryableEurekaHttpClient.execute(RetryableEurekaHttpClient.java:111) ~[eureka-client-1.7.0.jar:1.7.0]
+#             at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.sendHeartBeat(EurekaHttpClientDecorator.java:89) ~[eureka-client-1.7.0.jar:1.7.0]
+#             at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$3.execute(EurekaHttpClientDecorator.java:92) ~[eureka-client-1.7.0.jar:1.7.0]
+#             at com.netflix.discovery.shared.transport.decorator.SessionedEurekaHttpClient.execute(SessionedEurekaHttpClient.java:77) ~[eureka-client-1.7.0.jar:1.7.0]
+#             at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.sendHeartBeat(EurekaHttpClientDecorator.java:89) ~[eureka-client-1.7.0.jar:1.7.0]
+#             at com.netflix.discovery.DiscoveryClient.renew(DiscoveryClient.java:824) ~[eureka-client-1.7.0.jar:1.7.0]
+#             at com.netflix.discovery.DiscoveryClient$HeartbeatThread.run(DiscoveryClient.java:1388) [eureka-client-1.7.0.jar:1.7.0]
+#             at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [na:1.8.0_151]
+#             at java.util.concurrent.FutureTask.run(FutureTask.java:266) [na:1.8.0_151]
+#             at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [na:1.8.0_151]
+#             at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [na:1.8.0_151]
+#             at java.lang.Thread.run(Thread.java:748) [na:1.8.0<=========----> 75% EXECUTING [4m 12s]
+#                                                               > :eureka-server:bootRun
+#     2018-03-24 18:38:02.350 ERROR 12223 --- [freshExecutor-0] d.RedirectingEurekaHttpClient  : Request execution error
+#     
+#     com.sun.jersey.api.client.ClientHandlerException: java.net.ConnectException: Connection refused (Connection refused)
+#             at com.sun.jersey.client.apache4.ApacheHttpClient4Handler.handle(ApacheHttpClient4Handler.java:187) ~[jersey-apache-client4-1.19.1.jar:1.19.1]
+#             at com.sun.jersey.api.client.filter.GZIPContentEncodingFilter.handle(GZIPContentEncodingFilter.java:123) ~[jersey-client-1.19.1.jar:1.19.1]
+#             at com.netflix.discovery.EurekaIdentityHeaderFilter.handle(EurekaIdentityHeaderFilter.java:27) ~[eureka-client-1.7.0.jar:1.7.0]
+#             at com.sun.jersey.api.client.Client.handle(Client.java:652) ~[jersey-client-1.19.1.jar:1.19.1]
+#             at        at com.sun.jersey.api.client.WebResource$Builder.get(WebResource.java:509) ~[jersey-client-1.19.1.jar:1.19.1]
+#             at com.netflix.discovery.shared.transport.jersey.AbstractJerseyEurekaHttpClient.getApplicationsInternal(AbstractJerseyEurekaHttpClient.java:194) ~[eureka-client-1.7.0.jar:1.7.0]
+#             at com.netflix.discovery.shared.transport.jersey.Abstrac<=========----> 75% EXECUTING [4m 22s]
+#     > :eureka-<=========----> 75% EXECUTING [8m 51s]                > :eureka-server:bootRun
+#               > :config-server:bootRun                              ekaHttpClient.getApplications(AbstractJerseyEurekaHttpClient.java:165) ~[eureka-client-1.7.0.jar:1.7.0]
+#     <=========----> 75% EXECUTING [4m 28s]
+#     > :eureka-server:bootRun
+#     
+
+

README.md

@@ -1,5 +1,14 @@
 # Java micro-services
 
+## To improve in the architecture. 
+
+For what concerns security, we should expose as few ports as possible and have only secure calls from the outside, but security here is not the question here... Let's answer this for real now. 
+
+It seems that we need to start many microservices in parallel, the architecture is scattered there and there. This is tedious and the web app could be more self-contained. In just an hour, analysing this feels heavy. There is too much complexity in this project for such as scope. No localhost things called amid the code execution would be a good thing to have. Doing local API calls is inefficient in a local environment, both in term of software engineering, development, time spent, and material resources. We should just call code with packages in java rather than always passing trough many ridiculous REST APIS. Those excessive APIS consumes more RAM than it should, take more time to devlelop, are too complex, and on. I would work on simplifying the system and making it more lightweight on the architecture side. 
+
+What I would do with unilimited time is to find a way to merge those different services into one clean service to start. If needed, the database can still be left as a different microservice running elsewhere: it's common practice to decouple storage layers from  business logic. It could me more clear how and when to use docker and graddle. 
+
+
 ## Build
 build all projects
 ```

communication/src/main/java/com/ship/communication/model/Message.java

@@ -2,6 +2,10 @@
 
 import com.fasterxml.jackson.annotation.JsonCreator;
 import com.fasterxml.jackson.annotation.JsonProperty;
+import org.springframework.util.Assert;
+import java.util.Arrays;
+import java.util.ArrayList;
+import java.util.List;
 
 import javax.persistence.*;
 import java.io.Serializable;
@@ -26,6 +30,7 @@ public class Message implements Serializable {
 
     @Column(nullable = false)
     private String sender;
+    private static List<String> ranks = Arrays.asList("CREWMAN", "ENSIGN", "LIEUTENANT", "COMMANDER", "CAPTAIN", "VICE_ADMIRAL", "ADMIRAL");
 
     @JsonCreator
     public Message(@JsonProperty("id") Long id,
@@ -34,6 +39,9 @@ public Message(@JsonProperty("id") Long id,
                    @JsonProperty("recipient") String recipient,
                    @JsonProperty("sender") String sender
                    ) {
+        int senderRank = ranks.indexOf(sender);
+        int recipientRank = ranks.indexOf(recipient);
+        Assert.isTrue(recipientRank <= senderRank + 1, "Cannot send message");
         this.id = id;
         this.title = title;
         this.content = content;

eureka-server.yml

@@ -0,0 +1,13 @@
+eureka:
+  client:
+    fetchRegistry: false
+    region: default
+    registerWithEureka: false
+    registryFetchIntervalSeconds: 5
+server:
+  port: 8082
+spring:
+  application:
+    name: eureka-server
+  redis:
+    port: 6379