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Java client library for the New Relic REST APIs built using Jersey and Gson.
The library includes over 110 operations across all of the available 35 New Relic services.
It can be used by applications to automate the configuration of New Relic Monitoring, Alerting and Dashboards, but can also be used for extracting incident and metric data, executing Insights queries, and uploading plugin metrics.
/*
* Copyright 2018 Gerald Curley
*
* 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 com.opsmatters.newrelic.api.services;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.Map;
import java.util.List;
import java.util.logging.Logger;
import java.util.logging.Level;
import javax.ws.rs.client.Client;
import javax.ws.rs.client.WebTarget;
import javax.ws.rs.client.Invocation;
import javax.ws.rs.client.Entity;
import javax.ws.rs.core.GenericType;
import javax.ws.rs.core.Response;
import javax.ws.rs.core.MediaType;
import com.google.gson.Gson;
import com.google.common.base.Optional;
import com.opsmatters.newrelic.api.model.ErrorResponse;
import com.opsmatters.newrelic.api.exceptions.ErrorResponseException;
/**
* Represents the set of HTTP operations to be used with the API calls.
*
* @author Gerald Curley (opsmatters)
*/
public class HttpContext
{
private static final Logger logger = Logger.getLogger(HttpContext.class.getName());
private Client client;
private String protocol = "http";
private String hostname;
private int port;
private Gson gson = new Gson();
private boolean throwExceptions = false;
private String uriPrefix = "";
private static final GenericType ERROR = new GenericType(){};
/**
* Constructor that takes a client, protocol, hostname and port.
* @param client The Jersey client
* @param protocol The protocol used to connect to the server
* @param hostname The hostname of the server
* @param port The port of the server
*/
public HttpContext(Client client, String protocol, String hostname, int port)
{
this.protocol = protocol;
this.hostname = hostname;
this.port = port;
this.client = client;
}
/**
* Build the URL from the protocol://hostname:port + uriPrefix + relativePath
* @param relativePath The path of the resource (should always start with a "/")
* @return The URL to call
*/
String buildUrl(String relativePath)
{
return String.format("%s://%s:%s%s%s", this.protocol, this.hostname, this.port, this.uriPrefix, relativePath);
}
/**
* Build the URI from the protocol://hostname:port + uriPrefix + relativePath.
* @param relativePath The path of the resource (should always start with a "/")
* @return The URI to call
*/
URI buildUri(String relativePath)
{
URI uri = null;
try
{
uri = new URI(buildUrl(relativePath));
}
catch (URISyntaxException e)
{
logger.severe("Problem constructing URI: "+e.getClass().getName()+e.getMessage());
}
return uri;
}
/**
* Execute a GET call against the partial URL and deserialize the results.
* @param The type parameter used for the return object
* @param partialUrl The partial URL to build
* @param returnType The expected return type
* @return The return type
*/
public Optional GET(String partialUrl, GenericType returnType)
{
URI uri = buildUri(partialUrl);
return executeGetRequest(uri, returnType);
}
/**
* Execute a GET call against the partial URL and deserialize the results.
* @param The type parameter used for the return object
* @param partialUrl The partial URL to build
* @param returnType The expected return type
* @param headers A set of headers to add to the request
* @param queryParams A set of query parameters to add to the request
* @return The return type
*/
public Optional GET(String partialUrl, Map headers,
List queryParams, GenericType returnType)
{
URI uri = buildUri(partialUrl);
return executeGetRequest(uri, headers, queryParams, returnType);
}
/**
* Execute a PUT call against the partial URL.
* @param partialUrl The partial URL to build
* @param payload The object to use for the PUT
*/
public void PUT(String partialUrl, Object payload)
{
URI uri = buildUri(partialUrl);
executePutRequest(uri, payload);
}
/**
* Execute a PUT call against the partial URL.
* @param partialUrl The partial URL to build
* @param payload The object to use for the PUT
* @param headers A set of headers to add to the request
* @param queryParams A set of query parameters to add to the request
*/
public void PUT(String partialUrl, Object payload, Map headers,
List queryParams)
{
URI uri = buildUri(partialUrl);
executePutRequest(uri, payload, headers, queryParams);
}
/**
* Execute a PUT call against the partial URL.
* @param The type parameter used for the return object
* @param partialUrl The partial URL to build
* @param payload The object to use for the PUT
* @param returnType The expected return type
* @return The return type
*/
public Optional PUT(String partialUrl, Object payload, GenericType returnType)
{
URI uri = buildUri(partialUrl);
return executePutRequest(uri, payload, null, null, returnType);
}
/**
* Execute a PUT call against the partial URL.
* @param The type parameter used for the return object
* @param partialUrl The partial URL to build
* @param payload The object to use for the PUT
* @param headers A set of headers to add to the request
* @param queryParams A set of query parameters to add to the request
* @param returnType The expected return type
* @return The return type
*/
public Optional PUT(String partialUrl, Object payload,
Map headers, List queryParams, GenericType returnType)
{
URI uri = buildUri(partialUrl);
return executePutRequest(uri, payload, headers, queryParams, returnType);
}
/**
* Execute a POST call against the partial URL.
* @param partialUrl The partial URL to build
* @param payload The object to use for the POST
* @return The response to the POST
*/
public Optional POST(String partialUrl, Object payload)
{
URI uri = buildUri(partialUrl);
return executePostRequest(uri, payload);
}
/**
* Execute a POST call against the partial URL.
* @param partialUrl The partial URL to build
* @param payload The object to use for the POST
* @param headers A set of headers to add to the request
* @return The response to the POST
*/
public Optional POST(String partialUrl, Object payload, Map headers)
{
URI uri = buildUri(partialUrl);
return executePostRequest(uri, payload, headers);
}
/**
* Execute a POST call against the partial URL.
* @param The type parameter used for the return object
* @param partialUrl The partial URL to build
* @param payload The object to use for the POST
* @param returnType The expected return type
* @return The return type
*/
public Optional POST(String partialUrl, Object payload, GenericType returnType)
{
URI uri = buildUri(partialUrl);
return executePostRequest(uri, payload, returnType);
}
/**
* Execute a POST call against the partial URL.
* @param The type parameter used for the return object
* @param partialUrl The partial URL to build
* @param payload The object to use for the POST
* @param headers A set of headers to add to the request
* @param returnType The expected return type
* @return The return type
*/
public Optional POST(String partialUrl, Object payload,
Map headers, GenericType returnType)
{
URI uri = buildUri(partialUrl);
return executePostRequest(uri, payload, headers, returnType);
}
/**
* Execute a PATCH call against the partial URL.
* @param partialUrl The partial URL to build
* @param payload The object to use for the PATCH
*/
public void PATCH(String partialUrl, Object payload)
{
URI uri = buildUri(partialUrl);
executePatchRequest(uri, payload);
}
/**
* Execute a PATCH call against the partial URL.
* @param partialUrl The partial URL to build
* @param payload The object to use for the PATCH
* @param headers A set of headers to add to the request
* @param queryParams A set of query parameters to add to the request
*/
public void PATCH(String partialUrl, Object payload, Map headers,
List queryParams)
{
URI uri = buildUri(partialUrl);
executePatchRequest(uri, payload, headers, queryParams);
}
/**
* Execute a PATCH call against the partial URL.
* @param The type parameter used for the return object
* @param partialUrl The partial URL to build
* @param payload The object to use for the PATCH
* @param returnType The expected return type
* @return The return type
*/
public Optional PATCH(String partialUrl, Object payload, GenericType returnType)
{
URI uri = buildUri(partialUrl);
return executePatchRequest(uri, payload, null, null, returnType);
}
/**
* Execute a PATCH call against the partial URL.
* @param The type parameter used for the return object
* @param partialUrl The partial URL to build
* @param payload The object to use for the PATCH
* @param headers A set of headers to add to the request
* @param queryParams A set of query parameters to add to the request
* @param returnType The expected return type
* @return The return type
*/
public Optional PATCH(String partialUrl, Object payload,
Map headers, List queryParams, GenericType returnType)
{
URI uri = buildUri(partialUrl);
return executePatchRequest(uri, payload, headers, queryParams, returnType);
}
/**
* Execute a DELETE call against the partial URL.
* @param partialUrl The partial URL to build
*/
public void DELETE(String partialUrl)
{
URI uri = buildUri(partialUrl);
executeDeleteRequest(uri);
}
/**
* Execute a DELETE call against the partial URL.
* @param partialUrl The partial URL to build
* @param headers A set of headers to add to the request
* @param queryParams A set of query parameters to add to the request
*/
public void DELETE(String partialUrl, Map headers,
List queryParams)
{
URI uri = buildUri(partialUrl);
executeDeleteRequest(uri, headers, queryParams);
}
/**
* Execute a GET request and return the result.
* @param The type parameter used for the return object
* @param uri The URI to call
* @param returnType The type to marshall the result back into
* @return The return type
*/
protected Optional executeGetRequest(URI uri, GenericType returnType)
{
return executeGetRequest(uri, null, null, returnType);
}
/**
* Execute a GET request and return the result.
* @param The type parameter used for the return object
* @param uri The URI to call
* @param returnType The type to marshall the result back into
* @param headers A set of headers to add to the request
* @param queryParams A set of query parameters to add to the request
* @return The return type
*/
protected Optional executeGetRequest(URI uri, Map headers,
List queryParams, GenericType returnType)
{
WebTarget target = this.client.target(uri);
target = applyQueryParams(target, queryParams);
Invocation.Builder invocation = target.request(MediaType.APPLICATION_JSON);
applyHeaders(invocation, headers);
Response response = invocation.get();
handleResponseError("GET", uri, response);
logResponse(uri, response);
return extractEntityFromResponse(response, returnType);
}
/**
* Execute a PUT request.
* @param uri The URI to call
* @param obj The object to use for the PUT
*/
protected void executePutRequest(URI uri, Object obj)
{
executePutRequest(uri, obj, null, null);
}
/**
* Execute a PUT request.
* @param uri The URI to call
* @param obj The object to use for the PUT
* @param headers A set of headers to add to the request
* @param queryParams A set of query parameters to add to the request
*/
protected void executePutRequest(URI uri, Object obj, Map headers,
List queryParams)
{
WebTarget target = this.client.target(uri);
target = applyQueryParams(target, queryParams);
Invocation.Builder invocation = target.request(MediaType.APPLICATION_JSON);
applyHeaders(invocation, headers);
if(obj == null)
obj = Entity.text("");
Response response = invocation.put(Entity.entity(obj, MediaType.APPLICATION_JSON));
handleResponseError("PUT", uri, response);
logResponse(uri, response);
}
/**
* Execute a PUT request with a return object.
* @param The type parameter used for the return object
* @param uri The URI to call
* @param obj The object to use for the PUT
* @param headers A set of headers to add to the request
* @param queryParams A set of query parameters to add to the request
* @param returnType The type to marshall the result back into
* @return The return type
*/
protected Optional executePutRequest(URI uri, Object obj, Map headers,
List queryParams, GenericType returnType)
{
WebTarget target = this.client.target(uri);
target = applyQueryParams(target, queryParams);
Invocation.Builder invocation = target.request(MediaType.APPLICATION_JSON);
applyHeaders(invocation, headers);
if(obj == null)
obj = Entity.text("");
Response response = invocation.put(Entity.entity(obj, MediaType.APPLICATION_JSON));
handleResponseError("PUT", uri, response);
logResponse(uri, response);
return extractEntityFromResponse(response, returnType);
}
/**
* Execute a POST request.
* @param uri The URI to call
* @param obj The object to use for the POST
* @return The response to the POST
*/
protected Optional executePostRequest(URI uri, Object obj)
{
return executePostRequest(uri, obj, (Map)null);
}
/**
* Execute a POST request.
* @param uri The URI to call
* @param obj The object to use for the POST
* @param headers A set of headers to add to the request
* @return The response to the POST
*/
protected Optional executePostRequest(URI uri, Object obj, Map headers)
{
Invocation.Builder invocation = this.client.target(uri).request(MediaType.APPLICATION_JSON);
applyHeaders(invocation, headers);
Response response = invocation.post(Entity.entity(obj, MediaType.APPLICATION_JSON));
handleResponseError("POST", uri, response);
logResponse(uri, response);
return Optional.of(response);
}
/**
* Execute a POST request with a return object.
* @param The type parameter used for the return object
* @param uri The URI to call
* @param obj The object to use for the POST
* @param returnType The type to marshall the result back into
* @return The return type
*/
protected Optional executePostRequest(URI uri, Object obj, GenericType returnType)
{
return executePostRequest(uri, obj, null, returnType);
}
/**
* Execute a POST request with a return object.
* @param The type parameter used for the return object
* @param uri The URI to call
* @param obj The object to use for the POST
* @param headers A set of headers to add to the request
* @param returnType The type to marshall the result back into
* @return The return type
*/
protected Optional executePostRequest(URI uri, Object obj, Map headers, GenericType returnType)
{
Invocation.Builder invocation = this.client.target(uri).request(MediaType.APPLICATION_JSON);
applyHeaders(invocation, headers);
Response response = invocation.post(Entity.entity(obj, MediaType.APPLICATION_JSON));
handleResponseError("POST", uri, response);
logResponse(uri, response);
return extractEntityFromResponse(response, returnType);
}
/**
* Execute a PATCH request.
* @param uri The URI to call
* @param obj The object to use for the PATCH
*/
protected void executePatchRequest(URI uri, Object obj)
{
executePatchRequest(uri, obj, null, null);
}
/**
* Execute a PATCH request.
* @param uri The URI to call
* @param obj The object to use for the PATCH
* @param headers A set of headers to add to the request
* @param queryParams A set of query parameters to add to the request
*/
protected void executePatchRequest(URI uri, Object obj, Map headers,
List queryParams)
{
WebTarget target = this.client.target(uri);
target = applyQueryParams(target, queryParams);
Invocation.Builder invocation = target.request(MediaType.APPLICATION_JSON);
applyHeaders(invocation, headers);
if(obj == null)
obj = Entity.text("");
Response response = invocation.method("PATCH", Entity.entity(obj, MediaType.APPLICATION_JSON));
handleResponseError("PATCH", uri, response);
logResponse(uri, response);
}
/**
* Execute a PATCH request with a return object.
* @param The type parameter used for the return object
* @param uri The URI to call
* @param obj The object to use for the PATCH
* @param headers A set of headers to add to the request
* @param queryParams A set of query parameters to add to the request
* @param returnType The type to marshall the result back into
* @return The return type
*/
protected Optional executePatchRequest(URI uri, Object obj, Map headers,
List queryParams, GenericType returnType)
{
WebTarget target = this.client.target(uri);
target = applyQueryParams(target, queryParams);
Invocation.Builder invocation = target.request(MediaType.APPLICATION_JSON);
applyHeaders(invocation, headers);
if(obj == null)
obj = Entity.text("");
Response response = invocation.method("PATCH", Entity.entity(obj, MediaType.APPLICATION_JSON));
handleResponseError("PATCH", uri, response);
logResponse(uri, response);
return extractEntityFromResponse(response, returnType);
}
/**
* Execute a DELETE request.
* @param uri The URI to call
*/
protected void executeDeleteRequest(URI uri)
{
executeDeleteRequest(uri, null, null);
}
/**
* Execute a DELETE request.
* @param uri The URI to call
* @param headers A set of headers to add to the request
* @param queryParams A set of query parameters to add to the request
*/
protected void executeDeleteRequest(URI uri, Map headers,
List queryParams)
{
WebTarget target = this.client.target(uri);
target = applyQueryParams(target, queryParams);
Invocation.Builder invocation = target.request(MediaType.APPLICATION_JSON);
applyHeaders(invocation, headers);
Response response = invocation.delete();
handleResponseError("DELETE", uri, response);
logResponse(uri, response);
}
/**
* Extract the entity from the HTTP response.
* @param The type parameter used for the return object
* @param response The HTTP response to extract the entity from
* @param returnType The type to marshall the result back into
* @return The extracted entity
*/
private Optional extractEntityFromResponse(Response response, GenericType returnType)
{
if(response.hasEntity() && (response.getStatus() == 200 || response.getStatus() == 201))
return Optional.of(response.readEntity(returnType));
return Optional.absent();
}
/**
* Add the given set of headers to the web target.
* @param builder The invocation to add the headers to
* @param headers The headers to add
*/
private void applyHeaders(Invocation.Builder builder, Map headers)
{
if(headers != null)
{
for (Map.Entry e : headers.entrySet())
{
builder.header(e.getKey(), e.getValue());
}
}
}
/**
* Add the given set of query parameters to the web target.
* @param target The web target to add the parameters to
* @param queryParams The query parameters to add
* @return The updated target
*/
private WebTarget applyQueryParams(WebTarget target, List queryParams)
{
if(queryParams != null)
{
for(int i = 0; i < queryParams.size(); i += 2)
{
target = target.queryParam(queryParams.get(i), queryParams.get(i+1));
}
}
return target;
}
/**
* Log a HTTP error response.
* @param uri The URI used for the HTTP call
* @param response The HTTP call response
*/
private void logResponse(URI uri, Response response)
{
if(logger.isLoggable(Level.FINE))
logger.fine(uri.toString()+" => "+response.getStatus());
if(response.getStatus() > 300)
logger.warning(response.toString());
}
/**
* Handle HTTP error responses if {@link #throwExceptions() throwExceptions} returns true.
* @param method The HTTP method type
* @param uri The URI used for the HTTP call
* @param response The HTTP call response
*/
private void handleResponseError(String method, URI uri, Response response)
{
if(throwExceptions
&& response.getStatus() != 200
&& response.getStatus() != 201
&& response.getStatus() != 204)
{
ErrorResponse error = null;
if(response.hasEntity())
error = response.readEntity(ERROR);
throw new ErrorResponseException(method, response.getStatus(),
response.getStatusInfo().getReasonPhrase(), error);
}
}
/**
* Set to true if an exception should be thrown on an error HTTP response.
* @param throwExceptions true if an exception should be thrown on an error HTTP response
*/
public void setThrowExceptions(boolean throwExceptions)
{
this.throwExceptions = throwExceptions;
}
/**
* Returns true if an exception should be thrown on an error HTTP response.
* @return true if an exception should be thrown on an error HTTP response
*/
public boolean throwExceptions()
{
return throwExceptions;
}
/**
* Sets the uri prefix for resources used by the client.
* @param uriPrefix The uri prefix for the client
*/
public void setUriPrefix(String uriPrefix)
{
this.uriPrefix = uriPrefix;
}
/**
* Returns the uri prefix for resources used by the client.
* @return The uri prefix for the client
*/
public String getUriPrefix()
{
return uriPrefix;
}
}