Better http client configuration

Author: sleipnir

README.md

@@ -90,7 +90,7 @@ The second thing we have to do is add the spawn dependency to the project.
 <dependency>
    <groupId>com.github.eigr</groupId>
    <artifactId>spawn-java-std-sdk</artifactId>
-   <version>v0.3.5</version>
+   <version>v0.4.1</version>
 </dependency>
 ```
 We're also going to configure a few things for our application build to work, including compiling the protobuf files. 
@@ -124,7 +124,7 @@ See below a full example of the pom.xml file:
       <dependency>
          <groupId>com.github.eigr</groupId>
          <artifactId>spawn-java-std-sdk</artifactId>
-         <version>v0.3.5</version>
+         <version>v0.4.1</version>
       </dependency>
       <dependency>
          <groupId>ch.qos.logback</groupId>

pom.xml

@@ -4,7 +4,7 @@
     <groupId>io.eigr.spawn</groupId>
     <artifactId>spawn-java-std-sdk</artifactId>
     <packaging>jar</packaging>
-    <version>0.3.5</version>
+    <version>0.4.1</version>
     <name>spawn-java-std-sdk</name>
     <url>http://maven.apache.org</url>
 

src/main/java/io/eigr/spawn/internal/client/OkHttpSpawnClient.java

@@ -6,6 +6,7 @@
 import org.slf4j.LoggerFactory;
 
 import java.util.Objects;
+import java.util.concurrent.TimeUnit;
 
 public final class OkHttpSpawnClient implements SpawnClient {
     private static final Logger log = LoggerFactory.getLogger(OkHttpSpawnClient.class);
@@ -20,13 +21,18 @@ public final class OkHttpSpawnClient implements SpawnClient {
     private final int proxyPort;
     private final OkHttpClient client;
 
-    //private SpawnProperties properties;
-
     public OkHttpSpawnClient(String system, String proxyHost, int proxyPort) {
         this.system = system;
         this.proxyHost = proxyHost;
         this.proxyPort = proxyPort;
-        this.client = new OkHttpClient();
+        this.client = new  OkHttpClient.Builder()
+                .connectTimeout(30, TimeUnit.SECONDS)
+                .readTimeout(30, TimeUnit.SECONDS)
+                .writeTimeout(30, TimeUnit.SECONDS)
+                .callTimeout(100, TimeUnit.SECONDS)
+                .retryOnConnectionFailure(true)
+                .connectionPool(new ConnectionPool(256, 100, TimeUnit.SECONDS))
+                .build();
     }
 
     @Override