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Diffstat (limited to 'sdclient/discovery-service/src/main/java/org/onap/msb/sdclient/wrapper/consul/Consul.java')
-rw-r--r-- | sdclient/discovery-service/src/main/java/org/onap/msb/sdclient/wrapper/consul/Consul.java | 281 |
1 files changed, 281 insertions, 0 deletions
diff --git a/sdclient/discovery-service/src/main/java/org/onap/msb/sdclient/wrapper/consul/Consul.java b/sdclient/discovery-service/src/main/java/org/onap/msb/sdclient/wrapper/consul/Consul.java new file mode 100644 index 0000000..db12cb6 --- /dev/null +++ b/sdclient/discovery-service/src/main/java/org/onap/msb/sdclient/wrapper/consul/Consul.java @@ -0,0 +1,281 @@ +/** + * Copyright 2016 ZTE, Inc. and others. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +package org.onap.msb.sdclient.wrapper.consul; + +import java.net.MalformedURLException; +import java.net.URL; + +import javax.net.ssl.SSLContext; +import javax.ws.rs.client.Client; +import javax.ws.rs.client.ClientBuilder; + +import org.onap.msb.sdclient.wrapper.consul.util.Jackson; +import org.onap.msb.sdclient.wrapper.consul.util.ObjectMapperContextResolver; + +import com.fasterxml.jackson.databind.ObjectMapper; +import com.fasterxml.jackson.datatype.guava.GuavaModule; +import com.fasterxml.jackson.jaxrs.json.JacksonJaxbJsonProvider; +import com.google.common.base.Optional; +import com.google.common.base.Predicate; +import com.google.common.collect.FluentIterable; +import com.google.common.net.HostAndPort; + +/** + * Client for interacting with the Consul HTTP API. + * + * @author rfast + */ +public class Consul { + + /** + * Default Consul HTTP API host. + */ + public static final String DEFAULT_HTTP_HOST = "localhost"; + + /** + * Default Consul HTTP API port. + */ + public static final int DEFAULT_HTTP_PORT = 8500; + + + + + + private final HealthClient healthClient; + + + /** + * Private constructor. + * + * @param url The full URL of a running Consul instance. + * @param builder JAX-RS client builder instance. + */ + private Consul(String url, ClientBuilder builder, ObjectMapper mapper) { + + if (!FluentIterable.from(builder.getConfiguration().getClasses()) + .filter(new Predicate<Class<?>>() { + @Override + public boolean apply(final Class<?> clazz) { + return JacksonJaxbJsonProvider.class.isAssignableFrom(clazz); + } + }).first().isPresent()) { + builder.register(JacksonJaxbJsonProvider.class); + } + final Client client = builder + .register(new ObjectMapperContextResolver(mapper)) + .build(); + + + this.healthClient = new HealthClient(client.target(url).path("v1").path("health")); + + + +// agentClient.ping(); + } + + /** + * Creates a new client given a complete URL. + * + * @deprecated Use {@link Consul.Builder} + * + * @param url The Consul API URL. + * @param builder The JAX-RS client builder instance. + * @return A new client. + */ + @Deprecated + public static Consul newClient(String url, ClientBuilder builder, ObjectMapper mapper) { + return new Consul(url, builder, mapper); + } + + /** + * Creates a new client given a host and a port. + * + * @deprecated Use {@link Consul.Builder} + * + * @param host The Consul API hostname or IP. + * @param port The Consul port. + * @param builder The JAX-RS client builder instance. + * @return A new client. + */ + @Deprecated + public static Consul newClient(String host, int port, ClientBuilder builder, ObjectMapper mapper) { + try { + return new Consul(new URL("http", host, port, "").toString(), builder, mapper); + } catch (MalformedURLException e) { + throw new ConsulException("Bad Consul URL", e); + } + } + + /** + * Creates a new client given a host and a port. + * + * @deprecated Use {@link Consul.Builder} + * + * @param host The Consul API hostname or IP. + * @param port The Consul port. + * @return A new client. + */ + @Deprecated + public static Consul newClient(String host, int port) { + return newClient(host, port, ClientBuilder.newBuilder(), Jackson.MAPPER); + } + + /** + * Creates a new client given a host and a port. + * + * @deprecated Use {@link Consul.Builder} + * + * @return A new client. + */ + @Deprecated + public static Consul newClient() { + return newClient(DEFAULT_HTTP_HOST, DEFAULT_HTTP_PORT); + } + + + + public HealthClient healthClient() { + return healthClient; + } + /** + * Creates a new {@link Builder} object. + * + * @return A new Consul builder. + */ + public static Builder builder() { + return new Builder(); + } + + /** + * Builder for {@link Consul} client objects. + */ + public static class Builder { + private URL url; + private Optional<SSLContext> sslContext = Optional.absent(); + private ObjectMapper objectMapper = Jackson.MAPPER; + private ClientBuilder clientBuilder = ClientBuilder.newBuilder(); + + { + try { + url = new URL("http", "localhost", 8500, ""); + } catch (MalformedURLException e) { + throw new RuntimeException(e); + } + } + + /** + * Constructs a new builder. + */ + Builder() { + + } + + /** + * Sets the URL from a {@link URL} object. + * + * @param url The Consul agent URL. + * @return The builder. + */ + public Builder withUrl(URL url) { + this.url = url; + + return this; + } + + /** + * Sets the URL from a {@link HostAndPort} object. + * + * @param hostAndPort The Consul agent host and port. + * @return The builder. + */ + public Builder withHostAndPort(HostAndPort hostAndPort) { + try { + this.url = new URL("http", hostAndPort.getHostText(), hostAndPort.getPort(), ""); + } catch (MalformedURLException e) { + throw new RuntimeException(e); + } + + return this; + } + + /** + * Sets the URL from a string. + * + * @param url The Consul agent URL. + * @return The builder. + */ + public Builder withUrl(String url) { + try { + this.url = new URL(url); + } catch (MalformedURLException e) { + throw new RuntimeException(e); + } + + return this; + } + + /** + * Sets the {@link SSLContext} for the client. + * + * @param sslContext The SSL context for HTTPS agents. + * @return The builder. + */ + public Builder withSslContext(SSLContext sslContext) { + this.sslContext = Optional.of(sslContext); + + return this; + } + + /** + * Sets the {@link ObjectMapper} for the client. + * + * @param objectMapper The {@link ObjectMapper} to use. + * @return The builder. + */ + public Builder withObjectMapper(ObjectMapper objectMapper) { + this.objectMapper = objectMapper; + + objectMapper.registerModule(new GuavaModule()); + + return this; + } + + /** + * Sets the JAX-RS {@link ClientBuilder} to use. + * + * @param clientBuilder The JAX-RS builder. + * @return This builder. + */ + public Builder withClientBuilder(ClientBuilder clientBuilder) { + this.clientBuilder = clientBuilder; + + return this; + } + + /** + * Constructs a new {@link Consul} client. + * + * @return A new Consul client. + */ + public Consul build() { + if (this.sslContext.isPresent()) { + this.clientBuilder.sslContext(this.sslContext.get()); + } + + return new Consul(this.url.toExternalForm(), this.clientBuilder, this.objectMapper); + } + } +} |