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- import org.vertx.java.core.Handler;
- import org.vertx.java.core.buffer.Buffer;
- import org.vertx.java.core.eventbus.Message;
- import org.vertx.java.core.http.HttpServerRequest;
- import org.vertx.java.core.http.HttpServerResponse;
- import org.vertx.java.core.json.JsonArray;
- import org.vertx.java.core.json.JsonObject;
- import org.vertx.java.core.json.impl.Json;
- import org.vertx.java.platform.Verticle;
- import java.text.DateFormat;
- import java.text.SimpleDateFormat;
- import java.util.Collections;
- import java.util.Date;
- import java.util.Random;
- import java.util.concurrent.ThreadLocalRandom;
- import freemarker.template.Template;
- import freemarker.template.Configuration;
- import java.io.StringReader;
- import java.io.Writer;
- import java.io.StringWriter;
- import java.util.List;
- import java.util.Map;
- import java.util.HashMap;
- import java.util.ArrayList;
- public class WebServer extends Verticle implements Handler<HttpServerRequest> {
- private final Buffer helloWorldBuffer = new Buffer("Hello, World!");
- private final String helloWorldContentLength = String.valueOf(helloWorldBuffer.length());
- private final DateFormat DATE_FORMAT = new SimpleDateFormat("EEE, dd MMM yyyyy HH:mm:ss z");
- private final Random random = ThreadLocalRandom.current();
- private String dateString;
- private static final String PATH_PLAINTEXT = "/plaintext";
- private static final String PATH_JSON = "/json";
- private static final String PATH_DB = "/db";
- private static final String PATH_QUERIES = "/queries";
- private static final String PATH_UPDATES = "/updates";
- private static final String PATH_FORTUNES = "/fortunes";
- private static final String RESPONSE_TYPE_PLAIN = "text/plain";
- private static final String RESPONSE_TYPE_HTML = "text/html";
- private static final String RESPONSE_TYPE_JSON = "application/json";
- private static final String HEADER_CONTENT_TYPE = "Content-Type";
- private static final String HEADER_CONTENT_LENGTH = "Content-Length";
- private static final String HEADER_SERVER = "Server";
- private static final String HEADER_SERVER_VERTX = "vert.x";
- private static final String HEADER_DATE = "Date";
- private static final String MONGO_ADDRESS = "hello.persistor";
- private static final String FREEMARKER_ADDRESS = "vertx.freemarker";
- private static final String UNDERSCORE_ID = "_id";
- private static final String TEXT_ID = "id";
- private static final String RANDOM_NUMBER = "randomNumber";
- private static final String TEXT_RESULT = "result";
- private static final String TEXT_RESULTS = "results";
- private static final String TEXT_QUERIES = "queries";
- private static final String TEXT_MESSAGE = "message";
- private static final String TEXT_MESSAGES = "messages";
- private static final String ADD_FORTUNE_MESSAGE = "Additional fortune added at request time.";
- private static final String HELLO_WORLD = "Hello, world!";
- private static final String TEXT_ACTION = "action";
- private static final String TEXT_CRITERIA = "criteria";
- private static final String TEXT_UPDATE = "update";
- private static final String TEXT_OBJ_NEW = "objNew";
- private static final String TEXT_FINDONE = "findone";
- private static final String TEXT_FIND = "find";
- private static final String TEXT_COLLECTION = "collection";
- private static final String TEXT_WORLD = "World";
- private static final String TEXT_FORTUNE = "Fortune";
- private static final String TEXT_MATCHER = "matcher";
- private static final String TEMPLATE_FORTUNE = "<!DOCTYPE html><html><head><title>Fortunes</title></head><body><table><tr><th>id</th><th>message</th></tr><#list messages as message><tr><td>${message.id?html}</td><td>${message.message?html}</td></tr></#list></table></body></html>";
-
- private Template ftlTemplate;
- @Override
- public void start() {
- try { ftlTemplate = new Template(TEXT_FORTUNE, new StringReader(TEMPLATE_FORTUNE), new Configuration(Configuration.VERSION_2_3_22)); } catch (Exception ex) { ex.printStackTrace(); }
- vertx.createHttpServer().requestHandler(WebServer.this).listen(8080);
- vertx.setPeriodic(1000, new Handler<Long>() {
- @Override
- public void handle(Long timerID) {
- formatDate();
- }
- });
- formatDate();
- }
- @Override
- public void handle(HttpServerRequest req) {
- switch (req.path()) {
- case PATH_PLAINTEXT:
- handlePlainText(req);
- break;
- case PATH_JSON:
- handleJson(req);
- break;
- case PATH_DB:
- handleDbMongo(req);
- break;
- case PATH_QUERIES:
- handleDBMongo(req,false);
- break;
- case PATH_UPDATES:
- handleDBMongo(req,true);
- break;
- case PATH_FORTUNES:
- handleFortunes(req);
- break;
- default:
- req.response().setStatusCode(404);
- req.response().end();
- }
- }
- private void formatDate() {
- dateString = DATE_FORMAT.format(new Date());
- }
- private void handleFortunes(HttpServerRequest req) {
- final HttpServerResponse resp = req.response();
-
- vertx.eventBus().send(
- MONGO_ADDRESS,
- new JsonObject()
- .putString(TEXT_ACTION, TEXT_FIND)
- .putString(TEXT_COLLECTION, TEXT_FORTUNE),
- new Handler<Message<JsonObject>>() {
- @Override
- public void handle(Message<JsonObject> reply) {
- JsonArray results = reply.body().getArray(TEXT_RESULTS);
-
- List<Fortune> fortunes = new ArrayList<>();
- for (Object fortune: results) {
- fortunes.add(new Fortune(
- ((JsonObject)fortune).getNumber(TEXT_ID).intValue(),
- ((JsonObject)fortune).getString(TEXT_MESSAGE)));
- }
- fortunes.add(new Fortune(0, ADD_FORTUNE_MESSAGE));
- Collections.sort(fortunes);
- Map model = new HashMap();
- model.put(TEXT_MESSAGES, fortunes);
- Writer writer = new StringWriter();
- try { ftlTemplate.process(model, writer); } catch (Exception ex) { ex.printStackTrace(); }
- Buffer buff = new Buffer(writer.toString());
- setHeaders(resp, RESPONSE_TYPE_HTML, String.valueOf(buff.length()));
- resp.end(buff);
- }
- });
- }
- private void handlePlainText(HttpServerRequest req) {
- HttpServerResponse resp = req.response();
- setHeaders(resp, RESPONSE_TYPE_PLAIN, helloWorldContentLength);
- resp.end(helloWorldBuffer);
- }
- private void handleJson(HttpServerRequest req) {
- Buffer buff = new Buffer(Json.encode(Collections.singletonMap(TEXT_MESSAGE, HELLO_WORLD)));
- HttpServerResponse resp = req.response();
- setHeaders(resp, RESPONSE_TYPE_JSON, String.valueOf(buff.length()));
- resp.end(buff);
- }
- private void handleDbMongo(final HttpServerRequest req) {
- findRandom(new Handler<Message<JsonObject>>() {
- @Override
- public void handle(Message<JsonObject> reply) {
- JsonObject world = getResultFromReply(reply);
- String result = world.encode();
- sendResponse(req, result);
- }
- });
- }
- private JsonObject getResultFromReply(Message<JsonObject> reply) {
- JsonObject body = reply.body();
- JsonObject world = body.getObject(TEXT_RESULT);
- Object id = world.removeField(UNDERSCORE_ID);
- world.putValue(TEXT_ID, Integer.valueOf(((Double)id).intValue()));
- return world;
- }
- private void handleDBMongo(final HttpServerRequest req, boolean randomUpdates) {
- int queriesParam = 1;
- try {
- queriesParam = Integer.parseInt(req.params().get(TEXT_QUERIES));
- } catch (NumberFormatException e) {
- queriesParam = 1;
- }
- if (queriesParam < 1) {
- queriesParam = 1;
- } else if (queriesParam > 500) {
- queriesParam = 500;
- }
- final MongoHandler dbh = new MongoHandler(req, queriesParam, randomUpdates);
- for (int i = 0; i < queriesParam; i++) {
- findRandom(dbh);
- }
- }
- private void findRandom(Handler<Message<JsonObject>> handler) {
- vertx.eventBus().send(
- MONGO_ADDRESS,
- new JsonObject()
- .putString(TEXT_ACTION, TEXT_FINDONE)
- .putString(TEXT_COLLECTION, TEXT_WORLD)
- .putObject(TEXT_MATCHER, new JsonObject().putNumber(UNDERSCORE_ID, (random.nextInt(10000) + 1))),
- handler);
- }
- private void updateRandom(JsonObject json) {
- vertx.eventBus().send(
- MONGO_ADDRESS,
- new JsonObject()
- .putString(TEXT_ACTION, TEXT_UPDATE)
- .putString(TEXT_COLLECTION, TEXT_WORLD)
- .putObject(TEXT_CRITERIA, new JsonObject().putValue(UNDERSCORE_ID, json.getValue(TEXT_ID)))
- .putObject(TEXT_OBJ_NEW, json)
- );
- }
- private void sendResponse(HttpServerRequest req, String result) {
- Buffer buff = new Buffer(result);
- HttpServerResponse resp = req.response();
- setHeaders(resp, RESPONSE_TYPE_JSON, String.valueOf(buff.length()));
- resp.end(buff);
- }
- private void setHeaders(HttpServerResponse resp, String contentType, String contentLength) {
- resp.putHeader(HEADER_CONTENT_TYPE, contentType);
- resp.putHeader(HEADER_CONTENT_LENGTH, contentLength);
- resp.putHeader(HEADER_SERVER, HEADER_SERVER_VERTX );
- resp.putHeader(HEADER_DATE, dateString);
- }
- private final class MongoHandler implements Handler<Message<JsonObject>> {
- private final HttpServerRequest req;
- private final int queries;
- private final JsonArray worlds;
- private final Random random;
- private final boolean randomUpdates;
- public MongoHandler(HttpServerRequest request, int queriesParam, boolean performRandomUpdates) {
- req = request;
- queries = queriesParam;
- randomUpdates = performRandomUpdates;
- random = ThreadLocalRandom.current();
- worlds = new JsonArray();
- }
- @Override
- public void handle(Message<JsonObject> reply) {
- JsonObject world = getResultFromReply(reply);
- if (randomUpdates) {
- world.putValue(RANDOM_NUMBER, (random.nextInt(10000) + 1));
- updateRandom(world);
- }
- worlds.add(world);
- if (worlds.size() == this.queries) {
- // All queries have completed; send the response.
- String result = worlds.encode();
- sendResponse(req, result);
- }
- }
- }
-
- public final class Fortune implements Comparable<Fortune> {
- public int id;
- public String message;
- public int getId() {
- return id;
- }
- public String getMessage() {
- return message;
- }
- public Fortune(int id, String message) {
- this.id = id;
- this.message = message;
- }
- @Override
- public int compareTo(Fortune other) {
- return message.compareTo(other.message);
- }
- }
- }
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