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opentelemetry-java-instrumentation
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Refactoring DW example

This commit is contained in:
Guillaume Polaert 2017-05-29 13:54:19 +02:00
parent 45c9676e92
commit a5c91dfbff
8 changed files with 144 additions and 145 deletions
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12
dd-trace-examples/dropwizard-mongo-client/src/main/java/com/example/helloworld/HelloWorldApplication.java
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@ -1,7 +1,6 @@
package com.example.helloworld;
import com.example.helloworld.resources.HelloWorldResource;
import com.example.helloworld.resources.SimpleCrudResource;
import io.dropwizard.Application;
import io.dropwizard.setup.Bootstrap;
import io.dropwizard.setup.Environment;
@ -21,17 +20,10 @@ public class HelloWorldApplication extends Application<HelloWorldConfiguration>
// nothing to do yet
}
@Override
public void run(HelloWorldConfiguration configuration, Environment environment) {
// Register resources
final HelloWorldResource resource = new HelloWorldResource(
configuration.getTemplate(),
configuration.getDefaultName()
);
environment.jersey().register(resource);
environment.jersey().register(new SimpleCrudResource());
}
}

26
dd-trace-examples/dropwizard-mongo-client/src/main/java/com/example/helloworld/HelloWorldConfiguration.java
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@ -1,34 +1,8 @@
package com.example.helloworld;
import io.dropwizard.Configuration;
import com.fasterxml.jackson.annotation.JsonProperty;
import org.hibernate.validator.constraints.NotEmpty;
public class HelloWorldConfiguration extends Configuration {
@NotEmpty
private String template;
@NotEmpty
private String defaultName = "Stranger";
@JsonProperty
public String getTemplate() {
return template;
}
@JsonProperty
public void setTemplate(String template) {
this.template = template;
}
@JsonProperty
public String getDefaultName() {
return defaultName;
}
@JsonProperty
public void setDefaultName(String name) {
this.defaultName = name;
}
}

43
dd-trace-examples/dropwizard-mongo-client/src/main/java/com/example/helloworld/api/Book.java Normal file
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@ -0,0 +1,43 @@
package com.example.helloworld.api;
import com.fasterxml.jackson.annotation.JsonProperty;
import org.bson.Document;
public class Book {
private final String title;
private final int numberPages;
private final String IsbnCode;
public Book(String isbnCode, String title, int numberPages) {
this.title = title;
this.numberPages = numberPages;
IsbnCode = isbnCode;
}
public Book(Document d) {
this(d.getString("isbn"), d.getString("title"), d.getInteger("page").intValue());
}
@JsonProperty("ISBN")
public String getIsbnCode() {
return IsbnCode;
}
public String getTitle() {
return title;
}
public int getNumberPages() {
return numberPages;
}
public Document toDocument() {
return new Document("isbn", IsbnCode)
.append("title", title)
.append("page", numberPages);
}
}

28
dd-trace-examples/dropwizard-mongo-client/src/main/java/com/example/helloworld/api/Saying.java
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@ -1,28 +0,0 @@
package com.example.helloworld.api;
import com.fasterxml.jackson.annotation.JsonProperty;
public class Saying {
private long id;
private String content;
public Saying() {
// Jackson deserialization
}
public Saying(long id, String content) {
this.id = id;
this.content = content;
}
@JsonProperty
public long getId() {
return id;
}
@JsonProperty
public String getContent() {
return content;
}
}

2
dd-trace-examples/dropwizard-mongo-client/src/main/java/com/example/helloworld/client/TracedClient.java
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@ -18,7 +18,7 @@ public class TracedClient {
OkHttpClient client = new OkHttpClient().newBuilder().build();
Request request = new Request.Builder()
.url("http://localhost:8080/hello/history")
.url("http://localhost:8080/demo/")
.build();
Response response = client.newCall(request).execute();

77
dd-trace-examples/dropwizard-mongo-client/src/main/java/com/example/helloworld/resources/HelloWorldResource.java
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@ -1,77 +0,0 @@
package com.example.helloworld.resources;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.atomic.AtomicLong;
import java.util.function.Consumer;
import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.QueryParam;
import javax.ws.rs.core.MediaType;
import org.bson.Document;
import com.codahale.metrics.annotation.Timed;
import com.example.helloworld.api.Saying;
import com.google.common.base.Optional;
import com.mongodb.MongoClient;
import com.mongodb.client.ListDatabasesIterable;
import io.opentracing.contrib.agent.Trace;
@Path("/hello")
@Produces(MediaType.APPLICATION_JSON)
public class HelloWorldResource {
private final String template;
private final String defaultName;
private final AtomicLong counter;
// Instantiate Synchronous Tracing MongoClient
private final MongoClient mongoClient = new MongoClient("localhost", 27017);
public HelloWorldResource(String template, String defaultName) {
this.template = template;
this.defaultName = defaultName;
this.counter = new AtomicLong();
}
@GET
@Timed
public Saying sayHello(@QueryParam("name") Optional<String> name) throws InterruptedException {
final String value = String.format(template, name.or(defaultName));
return new Saying(counter.incrementAndGet(), value);
}
@GET
@Path("/history")
public Object history() throws InterruptedException {
beforeDB();
// Trace: Do some stuff with the DB
ListDatabasesIterable<Document> documents = mongoClient.listDatabases();
final List<String> list = new ArrayList<String>();
documents.forEach(new Consumer<Document>() {
@Override
public void accept(Document t) {
list.add(t.toJson());
}
});
afterDB();
return list;
}
@Trace(operationName="Before DB",tagsKV={"mytag","myvalue"})
public void beforeDB() throws InterruptedException{
Thread.sleep(333);
}
@Trace(operationName="After DB",tagsKV={"mytag","myvalue"})
public void afterDB() throws InterruptedException{
Thread.sleep(111);
}
}

98
dd-trace-examples/dropwizard-mongo-client/src/main/java/com/example/helloworld/resources/SimpleCrudResource.java Normal file
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@ -0,0 +1,98 @@
package com.example.helloworld.resources;
import com.example.helloworld.api.Book;
import com.google.common.base.Optional;
import com.mongodb.MongoClient;
import com.mongodb.MongoClientOptions;
import com.mongodb.client.MongoCursor;
import com.mongodb.client.MongoDatabase;
import io.opentracing.contrib.agent.Trace;
import org.bson.Document;
import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.QueryParam;
import javax.ws.rs.core.MediaType;
import java.util.ArrayList;
import java.util.List;
@Path("/demo")
@Produces(MediaType.APPLICATION_JSON)
public class SimpleCrudResource {
// Instantiate Synchronous Tracing MongoClient
private final MongoDatabase db;
public SimpleCrudResource() {
MongoClientOptions settings = MongoClientOptions.builder()
.codecRegistry(com.mongodb.MongoClient.getDefaultCodecRegistry())
.build();
MongoClient client = new MongoClient("localhost", settings);
client.dropDatabase("demo");
db = client.getDatabase("demo");
db.createCollection("books");
}
@GET
@Path("/add")
public String addBook(
@QueryParam("isbn") Optional<String> isbn,
@QueryParam("title") Optional<String> title,
@QueryParam("page") Optional<Integer> page
) throws InterruptedException {
// Simple business need to execute before saving a new book
beforeDB();
if (!isbn.isPresent()) {
throw new IllegalArgumentException("ISBN should not be null");
}
Book book = new Book(
isbn.get(),
title.or("missing title"),
page.or(0));
db.getCollection("books").insertOne(book.toDocument());
return "Book saved";
}
@GET
public List<Book> getBooks() throws InterruptedException {
// Simple business need to execute before saving a new book
beforeDB();
List<Book> books = new ArrayList<>();
try (MongoCursor<Document> cursor = db.getCollection("books").find().iterator();) {
while (cursor.hasNext()) {
books.add(new Book(cursor.next()));
}
}
// Simple business need to execute after retrieve the book list
afterDB();
return books;
}
@Trace(operationName = "Before DB", tagsKV = {"mytag", "myvalue"})
public void beforeDB() throws InterruptedException {
Thread.sleep(333);
}
@Trace(operationName = "After DB", tagsKV = {"mytag", "myvalue"})
public void afterDB() throws InterruptedException {
Thread.sleep(111);
}
}

3
dd-trace-examples/dropwizard-mongo-client/src/main/resources/configuration.yaml
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@ -1,6 +1,3 @@
template: Hello, %s!
defaultName: Stranger
logging:
level: INFO
loggers: