Allow setting the private key string directly

README.md

@@ -17,7 +17,7 @@ Add the `gr4vy-java` dependency to your pom.xml:
   	<dependency>
 	    <groupId>com.github.gr4vy</groupId>
 	    <artifactId>gr4vy-java</artifactId>
-	    <version>0.18.0</version>
+	    <version>0.20.0</version>
 	</dependency>
 ```
 
@@ -111,7 +111,7 @@ needs to be created before it can be used in this way.
 ## Initialization
 
 The client can be initialized with the Gr4vy ID (`gr4vyId`) and the location of your
-private key string.
+private key string (see Setting Private Key below).
 
 ```java
   Gr4vyClient gr4vyClient = new Gr4vyClient("[YOUR_GR4VY_ID]", "private_key.pem");
@@ -125,9 +125,19 @@ of the server to use directly.
   gr4vyClient.setHost("https://api.acme.gr4vy.app")
 ```
 
+## Setting Private Key
+
 Your API private key can be created in your admin panel on the **Integrations**
 tab.
 
+There are three methods of setting the private key when using the SDK:
+
+1. Setting the private key location in the Gr4vyClient
+2. Calling `client.setPrivateKeyString("<PRIVATE_KEY_STRING>");`
+3. Setting the environment variable `PRIVATE_KEY`
+
+NOTE: When options 2 & 3 are used, the private key location in the Initialization
+can be null.
 
 ## Making API calls
 

pom.xml

@@ -5,7 +5,7 @@
     <artifactId>gr4vy</artifactId>
     <packaging>jar</packaging>
     <name>gr4vy</name>
-    <version>0.19.0</version>
+    <version>0.20.0</version>
     <url>https://gr4vy.com</url>
     <description>Gr4vy Java SDK</description>
 

src/main/java/com/gr4vy/sdk/Gr4vyClient.java

@@ -50,6 +50,7 @@
 public class Gr4vyClient {
 	private OkHttpClient okClient; 
 	private String privateKeyLocation;
+	private String privateKeyString = null;
 	private String host;
 	private String environment;
 	private Boolean debug = false;
@@ -89,6 +90,10 @@ public Gr4vyClient(String gr4vyId, String privateKeyLocation, Boolean debug, Str
         this.host = "https://api." + apiPrefix + gr4vyId  + ".gr4vy.app";
         this.debug = debug;
     }
+
+    public void setPrivateKeyString(String privateKeyString) {
+    	this.privateKeyString = privateKeyString;
+    }
 
     public void setMerchantAccountId(String merchantAccountId) {
     	this.merchantAccountId = merchantAccountId;
@@ -209,6 +214,9 @@ private static ECPublicKey publicFromPrivate(ECPrivateKey key) throws NoSuchAlgo
 	}
 
 	public String getKey() {
+		if (this.privateKeyString != null) {
+			return this.privateKeyString;
+		}
 		String value = System.getenv("PRIVATE_KEY");
         if (value != null) {
             return value;