Finish RESTful Client API

Issue-ID: AAF-361
Change-Id: I999cb419a79c5995baf3757fdbbe047528901597
Signed-off-by: Instrumental <jonathan.gathman@att.com>

2 files changed, 303 insertions, 22 deletions

diff --git a/cadi/oauth-enduser/src/main/java/org/onap/aaf/cadi/enduser/SimpleRESTClient.java b/cadi/oauth-enduser/src/main/java/org/onap/aaf/cadi/enduser/SimpleRESTClient.java
index 386d938c..30344de5 100644
--- a/cadi/oauth-enduser/src/main/java/org/onap/aaf/cadi/enduser/SimpleRESTClient.java
+++ b/cadi/oauth-enduser/src/main/java/org/onap/aaf/cadi/enduser/SimpleRESTClient.java
@@ -21,11 +21,14 @@
 package org.onap.aaf.cadi.enduser;
 
 import java.io.IOException;
+import java.io.OutputStream;
+import java.io.PrintWriter;
 import java.net.ConnectException;
 import java.security.Principal;
 
 import org.onap.aaf.cadi.CadiException;
 import org.onap.aaf.cadi.LocatorException;
+import org.onap.aaf.cadi.client.EClient;
 import org.onap.aaf.cadi.client.Future;
 import org.onap.aaf.cadi.client.Rcli;
 import org.onap.aaf.cadi.client.Result;
@@ -37,8 +40,10 @@ import org.onap.aaf.cadi.oauth.TokenClientFactory;
 import org.onap.aaf.cadi.oauth.TzClient;
 import org.onap.aaf.cadi.principal.TaggedPrincipal;
 import org.onap.aaf.misc.env.APIException;
+import org.onap.aaf.misc.env.util.StringBuilderWriter;
 
 public class SimpleRESTClient {
+	private static final String APPLICATION_JSON = "application/json";
 	private static final String[] EMPTY = new String[0];
 	private final TokenClient tokenClient;
 	private final TzClient restClient;
@@ -93,13 +98,116 @@ public class SimpleRESTClient {
 		}
 		return this;
 	}
+	
+	/**
+	 * Single Threaded Class for building up content
+	 * @author jg1555
+	 *
+	 */
+	public static class Input {
+		private static final byte[] EMPTY_STREAM_BYTES = "".getBytes();
+
+		private String content;
+		private StringBuilder sb;
+		
+		public Input() {
+			content = null;
+			sb = null;
+		}
+		
+		public Input(final String content) {
+			this.content = content;
+		}
+		
+		public void set(final String content) {
+			this.content = content;
+		}
+		
+		public PrintWriter writer() {
+			return new PrintWriter(new StringBuilderWriter(builder()));
+		}
+		
+		public StringBuilder builder() {
+			if(sb==null) {
+				sb = new StringBuilder();
+				content = null;
+			}
+			return sb;
+		}
+		
+		/**
+		 * Reuse StringBuilder object
+		 */
+		public void clear() {
+			content = null;
+			if(sb!=null) {
+				sb.setLength(0);
+			}
+		}
+		
+		@Override
+		public String toString() {
+			if(content!=null) {
+				return content;
+			} else if(sb!=null) {
+				return sb.toString();
+			} else {
+				return "";
+			}
+		}
+
+		public byte[] getBytes() {
+			byte[] rv;
+			if(content==null) {
+				if(sb==null) {
+					rv = EMPTY_STREAM_BYTES;
+				} else {
+					rv = sb.toString().getBytes();	
+				}
+			} else {
+				rv = content.getBytes();
+			}
+			content = null;
+			return rv;
+		}
+	}
+
+	/////////////////////////////////////////////////////////////
+	//  
+	// CREATE
+	//
+	/////////////////////////////////////////////////////////////
+	public void create(final String path, final Input input) throws RESTException, CadiException, LocatorException, APIException  {
+		post(path,APPLICATION_JSON, input);
+	}
+
+	public void post(final String path, final Input input) throws RESTException, CadiException, LocatorException, APIException  {
+		post(path,APPLICATION_JSON, input);
+	}
+
+	public void post(final String path, final String contentType, final Input input) throws RESTException, CadiException, LocatorException, APIException  {
+		Future<Void> future = restClient.best(new Retryable<Future<Void>>() {
+			@Override
+			public Future<Void> code(Rcli<?> client) throws CadiException, ConnectException, APIException {
+				return client.create(path, contentType, new ETransfer(input));
+			}
+		});
+		if(!future.get(callTimeout)) {
+			throw new RESTException(future);
+		}					
+	}
 
+	/////////////////////////////////////////////////////////////
+	//  
+	// READ
+	//
+	/////////////////////////////////////////////////////////////
 	public String read(final String path) throws RESTException, CadiException, LocatorException, APIException  {
-		return get(path,"application/json");
+		return get(path,APPLICATION_JSON);
 	}
 
 	public String get(final String path) throws RESTException, CadiException, LocatorException, APIException  {
-		return get(path,"application/json");
+		return get(path,APPLICATION_JSON);
 	}
 
 	public String get(final String path, final String accepts) throws RESTException, CadiException, LocatorException, APIException  {
@@ -116,6 +224,69 @@ public class SimpleRESTClient {
 		}					
 	}
 	
+	/////////////////////////////////////////////////////////////
+	//  
+	// UPDATE
+	//
+	/////////////////////////////////////////////////////////////
+
+	public String update(final String path, final Input input) throws RESTException, CadiException, LocatorException, APIException  {
+		return put(path,APPLICATION_JSON, input);
+	}
+
+	public String put(final String path, final Input input) throws RESTException, CadiException, LocatorException, APIException  {
+		return put(path,APPLICATION_JSON, input);
+	}
+
+	public String put(final String path, final String contentType, final Input input) throws RESTException, CadiException, LocatorException, APIException  {
+		Future<String> future = restClient.best(new Retryable<Future<String>>() {
+			@Override
+			public Future<String> code(Rcli<?> client) throws CadiException, ConnectException, APIException {
+				return client.update(path, contentType, new ETransfer(input));
+			}
+		});
+		if(future.get(callTimeout)) {
+			return future.value;
+		} else {
+			throw new RESTException(future);
+		}					
+	}
+
+	/////////////////////////////////////////////////////////////
+	//  
+	// DELETE
+	//
+	/////////////////////////////////////////////////////////////
+	public void delete(final String path) throws RESTException, CadiException, LocatorException, APIException  {
+		delete(path,APPLICATION_JSON);
+	}
+		
+	public void delete(final String path, final String contentType) throws RESTException, CadiException, LocatorException, APIException  {
+		Future<Void> future = restClient.best(new Retryable<Future<Void>>() {
+			@Override
+			public Future<Void> code(Rcli<?> client) throws CadiException, ConnectException, APIException {
+				return client.delete(path, contentType);
+			}
+		});
+		if(!future.get(callTimeout)) {
+			throw new RESTException(future);
+		}					
+	}
+
+	/////////////////////////////////////////////////////////////
+	
+	private static class ETransfer implements EClient.Transfer {
+		private Input input;
+		public ETransfer(final Input input) {
+			this.input = input;
+		}
+		
+		@Override
+		public void transfer(OutputStream os) throws IOException, APIException {
+			os.write(input.getBytes());
+		}
+	}
+
 	public interface Headers {
 		String[] headers();
 	}
diff --git a/cadi/oauth-enduser/src/test/java/org/onap/aaf/cadi/enduser/test/SimpleRestClientExample.java b/cadi/oauth-enduser/src/test/java/org/onap/aaf/cadi/enduser/test/SimpleRestClientExample.java
index 7d251bad..6cabc654 100644
--- a/cadi/oauth-enduser/src/test/java/org/onap/aaf/cadi/enduser/test/SimpleRestClientExample.java
+++ b/cadi/oauth-enduser/src/test/java/org/onap/aaf/cadi/enduser/test/SimpleRestClientExample.java
@@ -21,6 +21,7 @@
 
 package org.onap.aaf.cadi.enduser.test;
 
+import java.io.PrintWriter;
 import java.net.URISyntaxException;
 import java.security.Principal;
 
@@ -29,6 +30,7 @@ import org.onap.aaf.cadi.LocatorException;
 import org.onap.aaf.cadi.enduser.ClientFactory;
 import org.onap.aaf.cadi.enduser.RESTException;
 import org.onap.aaf.cadi.enduser.SimpleRESTClient;
+import org.onap.aaf.cadi.enduser.SimpleRESTClient.Input;
 import org.onap.aaf.misc.env.APIException;
 
 
@@ -46,32 +48,93 @@ public class SimpleRestClientExample {
 						+ " add -Dmyurl=https://<aaf hello machine>:8130 to VM Args\n\t"
 						+ "where \"aaf hello machine\" is an aaf Installation you know about.");
 			} else {
-				SimpleRESTClient restClient = cf.simpleRESTClient(urlString,"org.osaaf.aaf");
-				
-				// Make some calls
 				
-				// Call with no Queries
-				String rv = restClient.get("resthello");
-				System.out.println(rv);
-				
-				// Same call with "read" style
-				rv = restClient.read("resthello");
-				System.out.println(rv);
+				SimpleRESTClient restClient = cf.simpleRESTClient(urlString,"org.osaaf.aaf");
+
+				/////////////////////////////////////////////////////////////
+				//  
+				// Creating Content for CREATE/UPDATE
+				//
+				/////////////////////////////////////////////////////////////
+				// Create an object that can be reusable IN THIS THREAD ONLY... Not Thread-safe on purpose
+				Input input = new SimpleRESTClient.Input();
 				
+				// Note: alternate use is to set the input object to an already created String
+				// Input input = new SimpleRESTClient.Input(aString);
 				
-				// Call with Queries
-				rv = restClient.get("resthello?perm=org.osaaf.people|*|read");
-				System.out.println(rv);
+				PrintWriter pw = input.writer();
+				pw.print("{\"something\": [");
+				for(int i=0;i<4;++i) {
+					if(i>0) {
+						pw.print(',');
+					}
+					pw.print("{\"myint\":");
+					pw.print(i);
+					pw.print('}');
+				}
+				pw.println("]}");
 				
-				// Call setting ID from principal coming from Trans
-				// Pretend Transaction
-				HRequest req = new HRequest("demo@people.osaaf.org"); // Pretend Trans has Jonathan as Identity
+				// You can check or log the content
+				String content = input.toString();
+				System.out.println(content);
 				
-				// Call with RESTException, which allows obtaining HTTPCode and any Error message sent
-				rv = restClient.endUser(req.userPrincipal()).get("resthello?perm=org.osaaf.people|*|read");
-				System.out.println(rv);
+				// Good form for Writers is that you should close it... 
+				pw.close();
+
+				/////////////////////////////////////////////////////////////
+				//  
+				// CREATE/POST
+				//
+				/////////////////////////////////////////////////////////////
+				System.out.println("-------- START REST CREATE/UPDATE --------");
+				try {
+					restClient.create("resthello/rest_id", input);
+					// No Error code, it worked.
+					System.out.println("No Error Code, Create worked...");
+				} catch (RESTException e) {
+					System.out.println(e.getCode());
+					System.out.println(e.getMsg());
+				} finally {
+					System.out.println("-------- END REST CREATE/UPDATE --------");
+				}
 
+
+				/////////////////////////////////////////////////////////////
+				//  
+				// READ/GET
+				//
+				/////////////////////////////////////////////////////////////
+
+				// Make some calls.  Note that RESTException is thrown if Call does not complete.
+				// RESTException has HTTP Code and any Message sent from Server
+				System.out.println("-------- START REST READ/GET --------");
+				boolean expectException = false;
 				try {
+					
+					// Call with no Queries
+					String rv = restClient.get("resthello/rest_id");
+					System.out.println(rv);
+					
+					// Same call with "read" style
+					rv = restClient.read("resthello/rest_id");
+					System.out.println(rv);
+					
+					
+					// Call with Queries
+					rv = restClient.get("resthello/rest_id?perm=org.osaaf.people|*|read");
+					System.out.println(rv);
+					
+					// Call setting ID from principal coming from Trans
+					// Pretend Transaction
+					HRequest req = new HRequest("demo@people.osaaf.org"); // Pretend Trans has Jonathan as Identity
+					
+					// Call with RESTException, which allows obtaining HTTPCode and any Error message sent
+					rv = restClient.endUser(req.userPrincipal()).get("resthello/rest_id?perm=org.osaaf.people|*|read");
+					System.out.println(rv);
+
+					// Expect Exception here.
+					System.out.println("-------- START Expecting Exception starting here --------");
+					expectException = true;
 					restClient.get("notAnAPI");
 				} catch(RESTException e) {
 					System.out.println(e.getCode());
@@ -79,10 +142,57 @@ public class SimpleRestClientExample {
 					System.out.println(e.getMessage());
 					System.out.println(e.getLocalizedMessage());
 					System.out.println(e);
+				} finally {
+					if(expectException) {
+						System.out.println("-------- END Expecting Exception starting here --------");
+					}
+					System.out.println("-------- END REST READ/GET --------");
 				}
 
+				/////////////////////////////////////////////////////////////
+				//  
+				// UPDATE/PUT
+				//
+				/////////////////////////////////////////////////////////////
+
+				
+				// If you use "input" object again as a writer, you can clear it on the same thread, and go again
+				input.clear();
+				// Here we just set to a String, instead of Writing
+				input.set("{\"something\" : []}");
+				
+				System.out.println("-------- END REST UPDATE/PUT --------");
+				try {
+					String rv = restClient.update("resthello/rest_id", input);
+					// No Error code, it worked.  REST Update will return the updated Data
+					System.out.println("Update worked");
+					System.out.println(rv);
+				} catch (RESTException e) {
+					System.out.println(e.getCode());
+					System.out.println(e.getMsg());
+				} finally {
+					System.out.println("-------- END REST UPDATE/PUT --------");
+				}
+
+				/////////////////////////////////////////////////////////////
+				//  
+				// DELETE
+				//
+				/////////////////////////////////////////////////////////////
+
+				System.out.println("-------- START REST DELETE --------");
+				try {
+					restClient.delete("resthello/rest_id");
+					// No Error code, it worked.  REST Update will return the updated Data
+					System.out.println("Delete worked");
+				} catch (RESTException e) {
+					System.out.println(e.getCode());
+					System.out.println(e.getMsg());
+				} finally {
+					System.out.println("-------- END REST DELETE --------");
+				}
 			}			
-		} catch (CadiException | APIException | RESTException e) {
+		} catch (CadiException | APIException e) {
 			e.printStackTrace();
 		}
 	}