http://git-wip-us.apache.org/repos/asf/incubator-juneau/blob/e6bf97a8/juneau-client/src/main/java/org/apache/juneau/client/package.html ---------------------------------------------------------------------- diff --git a/juneau-client/src/main/java/org/apache/juneau/client/package.html b/juneau-client/src/main/java/org/apache/juneau/client/package.html new file mode 100755 index 0000000..7f1ef7f --- /dev/null +++ b/juneau-client/src/main/java/org/apache/juneau/client/package.html @@ -0,0 +1,857 @@ +<!DOCTYPE HTML> +<!-- +/*************************************************************************************************************************** + * Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information regarding copyright ownership. 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No POJO parsing is performed. + // Note that when calling one of the getX() methods, you don't need to call connect() or disconnect(), since + // it's automatically called for you.</jc> + String output = client.doGet(<js>"http://localhost:9080/sample/addressBook";</js>) + .getResponseAsString(); + + <jc>// GET request, getting output as a Reader</jc> + Reader r = client.doGet(<js>"http://localhost:9080/sample/addressBook";</js>) + .getReader(); + + <jc>// GET request, getting output as an ObjectMap</jc> + <jc>// Input must be an object (e.g. "{...}")</jc> + ObjectMap m = client.doGet(<js>"http://localhost:9080/sample/addressBook/0";</js>) + .getResponse(ObjectMap.<jk>class</jk>); + + <jc>// GET request, getting output as a ObjectList</jc> + <jc>// Input must be an array (e.g. "[...]")</jc> + ObjectList l = client.doGet(<js>"http://localhost:9080/sample/addressBook";</js>) + .getResponse(ObjectList.<jk>class</jk>); + + <jc>// GET request, getting output as a parsed bean</jc> + <jc>// Input must be an object (e.g. "{...}")</jc> + <jc>// Note that you don't have to do any casting!</jc> + Person p = client.doGet(<js>"http://localhost:9080/sample/addressBook/0";</js>) + .getResponse(Person.<jk>class</jk>); + + <jc>// GET request, getting output as a parsed bean</jc> + <jc>// Input must be an array of objects (e.g. "[{...},{...}]")</jc> + Person[] pa = client.doGet(<js>"http://localhost:9080/sample/addressBook";</js>) + .getResponse(Person[].<jk>class</jk>); + + <jc>// Same as above, except as a List<Person></jc> + ClassMeta cm = BeanContext.<jsf>DEFAULT</jsf>.getCollectionClassMeta(LinkedList.<jk>class</jk>, Person.<jk>class</jk>); + List<Person> pl = client.doGet(<js>"http://localhost:9080/sample/addressBook";</js>) + .getResponse(cm); + + <jc>// GET request, getting output as a parsed string</jc> + <jc>// Input must be a string (e.g. "<string>foo</string>" or "'foo'")</jc> + String name = client.doGet(<js>"http://localhost:9080/sample/addressBook/0/name";</js>) + .getResponse(String.<jk>class</jk>); + + <jc>// GET request, getting output as a parsed number</jc> + <jc>// Input must be a number (e.g. "<number>123</number>" or "123")</jc> + <jk>int</jk> age = client.doGet(<js>"http://localhost:9080/sample/addressBook/0/age";</js>) + .getResponse(Integer.<jk>class</jk>); + + <jc>// GET request, getting output as a parsed boolean</jc> + <jc>// Input must be a boolean (e.g. "<boolean>true</boolean>" or "true")</jc> + <jk>boolean</jk> isCurrent = client.doGet(<js>"http://localhost:9080/sample/addressBook/0/addresses/0/isCurrent";</js>) + .getResponse(Boolean.<jk>class</jk>); + + <jc>// GET request, getting a filtered object</jc> + client.getParser().addTransforms(CalendarTransform.<jsf>ISO8601</jsf>.<jk>class</jk>); + Calendar birthDate = client.doGet(<js>"http://localhost:9080/sample/addressBook/0/birthDate";</js>) + .getResponse(GregorianCalendar.<jk>class</jk>); + + <jc>// PUT request on regular field</jc> + String newName = <js>"John Smith"</js>; + <jk>int</jk> rc = client.doPut(<js>"http://localhost:9080/addressBook/0/name";</js>, newName).execute(); + + <jc>// PUT request on filtered field</jc> + Calendar newBirthDate = <jk>new</jk> GregorianCalendar(1, 2, 3, 4, 5, 6); + rc = client.doPut(<js>"http://localhost:9080/sample/addressBook/0/birthDate";</js>, newBirthDate).execute(); + + <jc>// POST of a new entry to a list</jc> + Address newAddress = <jk>new</jk> Address(<js>"101 Main St"</js>, <js>"Anywhere"</js>, <js>"NY"</js>, 12121, <jk>false</jk>); + rc = client.doPost(<js>"http://localhost:9080/addressBook/0/addresses";</js>, newAddress).execute(); + </p> + + <h6 class='notes'>Notes:</h6> + <ul class='notes'> + <li><p>The {@link org.apache.juneau.client.RestClient} class exposes all the builder methods on the Apache HttpClient {@link org.apache.http.impl.client.HttpClientBuilder} class. + Use these methods to provide any customized HTTP client behavior..</p> + </ul> + + <!-- ======================================================================================================== --> + <a id="SSL"></a> + <h3 class='topic' onclick='toggle(this)'>1.1 - SSL Support</h3> + <div class='topic'> + <p> + The simplest way to enable SSL support in the client is to use the {@link org.apache.juneau.client.RestClient#enableSSL(SSLOpts)} method + and one of the predefined {@link org.apache.juneau.client.SSLOpts} instances: + <ul> + <li>{@link org.apache.juneau.client.SSLOpts#DEFAULT} - Normal certificate and hostname validation. + <li>{@link org.apache.juneau.client.SSLOpts#LAX} - Allows for self-signed certificates. + </ul> + </p> + <h6 class='topic'>Example:</h6> + <p class='bcode'> + <jc>// Create a client that ignores self-signed or otherwise invalid certificates.</jc> + RestClient restClient = <jk>new</jk> RestClient() + .enableSSL(SSLOpts.<jsf>LAX</jsf>); + + <jc>// ...or...</jc> + RestClient restClient = <jk>new</jk> RestClient() + .enableLaxSSL(); + </p> + <p> + This is functionally equivalent to the following: + </p> + <p class='bcode'> + RestClient restClient = <jk>new</jk> RestClient(); + + HostnameVerifier hv = <jk>new</jk> NoopHostnameVerifier(); + TrustManager tm = <jk>new</jk> SimpleX509TrustManager(<jk>true</jk>); + + <jk>for</jk> (String p : <jk>new</jk> String[]{<js>"SSL"</js>,<js>"TLS"</js>,<js>"SSL_TLS"</js>}) { + SSLContext ctx = SSLContext.<jsm>getInstance</jsm>(p); + ctx.init(<jk>null</jk>, <jk>new</jk> TrustManager[] { tm }, <jk>null</jk>); + SSLConnectionSocketFactory sf = <jk>new</jk> SSLConnectionSocketFactory(ctx, hv); + restClient.setSSLSocketFactory(sf); + Registry<ConnectionSocketFactory> r = RegistryBuilder.<ConnectionSocketFactory><jsm>.create</jsm>().register(<js>"https"</js>, sf).build(); + restClient.setConnectionManager(<jk>new</jk> PoolingHttpClientConnectionManager(r)); + } + </p> + <p> + More complex SSL support can be enabled through the various {@link org.apache.http.impl.client.HttpClientBuilder} methods defined on the class. + </p> + + <!-- ======================================================================================================== --> + <a id="SSLOpts"></a> + <h4 class='topic' onclick='toggle(this)'>1.1.1 - SSLOpts Bean</h4> + <div class='topic'> + <p> + The {@link org.apache.juneau.client.SSLOpts} class itself is a bean that can be created by the parsers. + For example, SSL options can be specified in a config file and retrieved as a bean using the {@link org.apache.juneau.ini.ConfigFile} class. + </p> + <h6 class='figure'>Contents of <code>MyConfig.cfg</code></h6> + <p class='bcode'> + <jc>#================================================================================ + # My Connection Settings + #================================================================================</jc> + [Connection] + url = https://myremotehost:9443 + ssl = {certValidate:'LAX',hostVerify:'LAX'} + </p> + <h6 class='figure'>Code that reads an <code>SSLOpts</code> bean from the config file</h6> + <p class='bcode'> + <jc>// Read config file and set SSL options based on what's in that file.</jc> + ConfigFile cf = ConfigMgr.<jsf>DEFAULT</jsf>.get(<js>"MyConfig.cfg"</js>); + SSLOpts ssl = cf.getObject(SSLOpts.<jk>class</jk>, <js>"Connection/ssl"</js>); + RestClient rc = <jk>new</jk> RestClient().enableSSL(ssl); + </p> + </div> + </div> + + <!-- ======================================================================================================== --> + <a id="Authentication"></a> + <h3 class='topic' onclick='toggle(this)'>1.2 - Authentication</h3> + <div class='topic'> + + <!-- ======================================================================================================== --> + <a id="BASIC"></a> + <h4 class='topic' onclick='toggle(this)'>1.2.1 - BASIC Authentication</h4> + <div class='topic'> + <p> + The {@link org.apache.juneau.client.RestClient#setBasicAuth(String,int,String,String)} method can be used to quickly enable + BASIC authentication support. + </p> + <h6 class='topic'>Example:</h6> + <p class='bcode'> + <jc>// Create a client that performs BASIC authentication using the specified user/pw.</jc> + RestClient restClient = <jk>new</jk> RestClient() + .setBasicAuth(<jsf>HOST</jsf>, <jsf>PORT</jsf>, <jsf>USER</jsf>, <jsf>PW</jsf>); + </p> + <p> + This is functionally equivalent to the following: + </p> + <p class='bcode'> + RestClient restClient = <jk>new</jk> RestClient(); + AuthScope scope = <jk>new</jk> AuthScope(<jsf>HOST</jsf>, <jsf>PORT</jsf>); + Credentials up = <jk>new</jk> UsernamePasswordCredentials(<jsf>USER</jsf>, <jsf>PW</jsf>); + CredentialsProvider p = <jk>new</jk> BasicCredentialsProvider(); + p.setCredentials(scope, up); + restClient.setDefaultCredentialsProvider(p); + </p> + </div> + + <!-- ======================================================================================================== --> + <a id="FORM"></a> + <h4 class='topic' onclick='toggle(this)'>1.2.2 - FORM-based Authentication</h4> + <div class='topic'> + <p> + The {@link org.apache.juneau.client.RestClient} class does not itself provide FORM-based authentication since there + is no standard way of providing such support. + Typically, to perform FORM-based or other types of authentication, you'll want to create your own + subclass of {@link org.apache.juneau.client.RestClient} and override the {@link org.apache.juneau.client.RestClient#createHttpClient()} + method to provide an authenticated client. + </p> + <p> + The following example shows how the <code>JazzRestClient</code> class provides + FORM-based authentication support. + </p> + <p class='bcode'> + <jd>/** + * Constructor. + */</jd> + <jk>public</jk> JazzRestClient(URI jazzUri, String user, String pw) <jk>throws</jk> IOException { + ... + } + + <jd>/** + * Override the createHttpClient() method to return an authenticated client. + */</jd> + <ja>@Override</ja> <jc>/* RestClient */</jc> + <jk>protected</jk> CloseableHttpClient createHttpClient() <jk>throws</jk> Exception { + CloseableHttpClient client = <jk>super</jk>.createHttpClient(); + formBasedAuthenticate(client); + visitAuthenticatedURL(client); + <jk>return</jk> client; + } + + <jc>/* + * Performs form-based authentication against the Jazz server. + */</jc> + <jk>private void</jk> formBasedAuthenticate(HttpClient client) <jk>throws</jk> IOException { + + URI uri2 = <jf>jazzUri</jf>.resolve(<js>"j_security_check"</js>); + HttpPost request = <jk>new</jk> HttpPost(uri2); + request.setConfig(RequestConfig.<jsm>custom</jsm>().setRedirectsEnabled(<jk>false</jk>).build()); + + <jc>// Charset must explicitly be set to UTF-8 to handle user/pw with non-ascii characters.</jc> + request.addHeader(<js>"Content-Type"</js>, <js>"application/x-www-form-urlencoded; charset=utf-8"</js>); + + NameValuePairs params = <jk>new</jk> NameValuePairs() + .append(<jk>new</jk> BasicNameValuePair(<js>"j_username""</js>, <jf>user</jf>)) + .append(<jk>new</jk> BasicNameValuePair(<js>"j_password"</js>, <jf>pw</jf>)); + request.setEntity(<jk>new</jk> UrlEncodedFormEntity(params)); + + HttpResponse response = client.execute(request); + <jk>try</jk> { + <jk>int</jk> rc = response.getStatusLine().getStatusCode(); + + Header authMsg = response.getFirstHeader(<js>"X-com-ibm-team-repository-web-auth-msg"</js>); + <jk>if</jk> (authMsg != <jk>null</jk>) + <jk>throw new</jk> IOException(authMsg.getValue()); + + <jc>// The form auth request should always respond with a 200 ok or 302 redirect code</jc> + <jk>if</jk> (rc == <jsf>SC_MOVED_TEMPORARILY</jsf>) { + <jk>if</jk> (response.getFirstHeader(<js>"Location"</js>).getValue().matches(<js>"^.*/auth/authfailed.*$"</js>)) + <jk>throw new</jk> IOException(<js>"Invalid credentials."</js>); + } <jk>else if</jk> (rc != <jsf>SC_OK</jsf>) { + <jk>throw new</jk> IOException(<js>"Unexpected HTTP status: "</js> + rc); + } + } <jk>finally</jk> { + EntityUtils.<jsm>consume</jsm>(response.getEntity()); + } + } + + <jc>/* + * This is needed for Tomcat because it responds with SC_BAD_REQUEST when the j_security_check URL is visited before an + * authenticated URL has been visited. This same URL must also be visited after authenticating with j_security_check + * otherwise tomcat will not consider the session authenticated + */</jc> + <jk>private int</jk> visitAuthenticatedURL(HttpClient httpClient) <jk>throws</jk> IOException { + HttpGet authenticatedURL = <jk>new</jk> HttpGet(<jf>jazzUri</jf>.resolve(<js>"authenticated/identity"</js>)); + HttpResponse response = httpClient.execute(authenticatedURL); + <jk>try</jk> { + <jk>return</jk> response.getStatusLine().getStatusCode(); + } <jk>finally</jk> { + EntityUtils.<jsm>consume</jsm>(response.getEntity()); + } + } + </p> + </div> + + <!-- ======================================================================================================== --> + <a id="OIDC"></a> + <h4 class='topic' onclick='toggle(this)'>1.2.3 - OIDC Authentication</h4> + <div class='topic'> + <p> + The following example shows how the <code>JazzRestClient</code> class provides + OIDC authentication support. + </p> + <p class='bcode'> + <jd>/** + * Constructor. + */</jd> + <jk>public</jk> JazzRestClient(URI jazzUri, String user, String pw) <jk>throws</jk> IOException { + ... + } + + <jd>/** + * Override the createHttpClient() method to return an authenticated client. + */</jd> + <ja>@Override</ja> <jc>/* RestClient */</jc> + <jk>protected</jk> CloseableHttpClient createHttpClient() <jk>throws</jk> Exception { + CloseableHttpClient client = <jk>super</jk>.createHttpClient(); + oidcAuthenticate(client); + <jk>return</jk> client; + } + + <jk>private void</jk> oidcAuthenticate(HttpClient client) <jk>throws</jk> IOException { + + HttpGet request = <jk>new</jk> HttpGet(<jf>jazzUri</jf>); + request.setConfig(RequestConfig.<jsm>custom</jsm>().setRedirectsEnabled(<jk>false</jk>).build()); + + <jc>// Charset must explicitly be set to UTF-8 to handle user/pw with non-ascii characters.</jc> + request.addHeader(<js>"Content-Type"</js>, <js>"application/x-www-form-urlencoded; charset=utf-8"</js>); + + HttpResponse response = client.execute(request); + <jk>try</jk> { + <jk>int</jk> code = response.getStatusLine().getStatusCode(); + + <jc>// Already authenticated</jc> + <jk>if</jk> (code == <jsf>SC_OK</jsf>) + <jk>return</jk>; + + <jk>if</jk> (code != <jsf>SC_UNAUTHORIZED</jsf>) + <jk>throw new</jk> RestCallException(<js>"Unexpected response during OIDC authentication: "</js> + response.getStatusLine()); + + <jc>// x-jsa-authorization-redirect</jc> + String redirectUri = getHeader(response, <js>"X-JSA-AUTHORIZATION-REDIRECT"</js>); + + <jk>if</jk> (redirectUri == <jk>null</jk>) + <jk>throw new</jk> RestCallException(<js>"Expected a redirect URI during OIDC authentication: "</js> + response.getStatusLine()); + + <jc>// Handle Bearer Challenge</jc> + HttpGet method = <jk>new</jk> HttpGet(redirectUri + <js>"&prompt=none"</js>); + addDefaultOidcHeaders(method); + + response = client.execute(method); + + code = response.getStatusLine().getStatusCode(); + + <jk>if</jk> (code != <jsf>SC_OK</jsf>) + <jk>throw new</jk> RestCallException(<js>"Unexpected response during OIDC authentication phase 2: "</js> + response.getStatusLine()); + + String loginRequired = getHeader(response, <js>"X-JSA-LOGIN-REQUIRED"</js>); + + <jk>if</jk> (! <js>"true"</js>.equals(loginRequired)) + <jk>throw new</jk> RestCallException(<js>"X-JSA-LOGIN-REQUIRED header not found on response during OIDC authentication phase 2: "</js> + response.getStatusLine()); + + method = <jk>new</jk> HttpGet(redirectUri + <js>"&prompt=none"</js>); + + addDefaultOidcHeaders(method); + response = client.execute(method); + + code = response.getStatusLine().getStatusCode(); + + <jk>if</jk> (code != <jsf>SC_OK</jsf>) + <jk>throw new</jk> RestCallException(<js>"Unexpected response during OIDC authentication phase 3: "</js> + response.getStatusLine()); + + <jc>// Handle JAS Challenge</jc> + method = <jk>new</jk> HttpGet(redirectUri); + addDefaultOidcHeaders(method); + + response = client.execute(method); + + code = response.getStatusLine().getStatusCode(); + + <jk>if</jk> (code != <jsf>SC_OK</jsf>) + <jk>throw new</jk> RestCallException(<js>"Unexpected response during OIDC authentication phase 4: "</js> + response.getStatusLine()); + + <jf>cookie</jf> = getHeader(response, <js>"Set-Cookie"</js>); + + Header[] defaultHeaders = <jk>new</jk> Header[] { + <jk>new</jk> BasicHeader(<js>"User-Agent"</js>, <js>"Jazz Native Client"</js>), + <jk>new</jk> BasicHeader(<js>"X-com-ibm-team-configuration-versions"</js>, <js>"com.ibm.team.rtc=6.0.0,com.ibm.team.jazz.foundation=6.0"</js>), + <jk>new</jk> BasicHeader(<js>"Accept"</js>, <js>"text/json"</js>), + <jk>new</jk> BasicHeader(<js>"Authorization"</js>, <js>"Basic "</js> + StringUtils.<jsm>base64EncodeToString</jsm>(<jf>user</jf> + <js>":"</js> + <jf>pw</jf>)), + <jk>new</jk> BasicHeader(<js>"Cookie"</js>, cookie) + }; + + setDefaultHeaders(Arrays.<jsm>asList</jsm>(defaultHeaders)); + + } <jk>finally</jk> { + EntityUtils.<jsm>consume</jsm>(response.getEntity()); + } + } + + <jk>private void</jk> addDefaultOidcHeaders(HttpRequestBase method) { + method.addHeader(<js>"User-Agent"</js>, <js>"Jazz Native Client"</js>); + method.addHeader(<js>"X-com-ibm-team-configuration-versions"</js>, <js>"com.ibm.team.rtc=6.0.0,com.ibm.team.jazz.foundation=6.0"</js>); + method.addHeader(<js>"Accept"</js>, <js>"text/json"</js>); + + <jk>if</jk> (<jf>cookie</jf> != <jk>null</jk>) { + method.addHeader(<js>"Authorization"</js>, <js>"Basic "</js> + StringUtils.<jsm>base64EncodeToString</jsm>(<jf>user</jf> + <js>":"</js> + <jf>pw</jf>)); + method.addHeader(<js>"Cookie"</js>, cookie); + } + } + </p> + </div> + </div> + + <!-- ======================================================================================================== --> + <a id="ResponsePatterns"></a> + <h3 class='topic' onclick='toggle(this)'>1.3 - Using Response Patterns</h3> + <div class='topic'> + <p> + One issue with REST (and HTTP in general) is that the HTTP response code must be set as a header before the + body of the request is sent. This can be problematic when REST calls invoke long-running processes, pipes + the results through the connection, and then fails after an HTTP 200 has already been sent. + </p> + <p> + One common solution is to serialize some text at the end to indicate whether the long-running process succeeded (e.g. <js>"FAILED"</js> or <js>"SUCCEEDED"</js>). + </p> + <p> + The {@link org.apache.juneau.client.RestClient} class has convenience methods for scanning the response without + interfering with the other methods used for retrieving output. + </p> + <p> + The following example shows how the {@link org.apache.juneau.client.RestCall#successPattern(String)} method can be used + to look for a SUCCESS message in the output: + </p> + <h6 class='topic'>Example:</h6> + <p class='bcode'> + <jc>// Throw a RestCallException if SUCCESS is not found in the output.</jc> + restClient.doPost(<jsf>URL</jsf>) + .successPattern(<js>"SUCCESS"</js>) + .run(); + </p> + <p> + The {@link org.apache.juneau.client.RestCall#failurePattern(String)} method does the opposite. + It throws an exception if a failure message is detected. + </p> + <h6 class='topic'>Example:</h6> + <p class='bcode'> + <jc>// Throw a RestCallException if FAILURE or ERROR is found in the output.</jc> + restClient.doPost(<jsf>URL</jsf>) + .failurePattern(<js>"FAILURE|ERROR"</js>) + .run(); + </p> + <p> + These convenience methods are specialized methods that use the {@link org.apache.juneau.client.RestCall#addResponsePattern(ResponsePattern)} + method which uses regular expression matching against the response body. + This method can be used to search for arbitrary patterns in the response body. + </p> + <p> + The following example shows how to use a response pattern finder to find and capture patterns for <js>"x=number"</js> and <js>"y=string"</js> + from a response body. + </p> + <h6 class='topic'>Example:</h6> + <p class='bcode'> + <jk>final</jk> List<Number> xList = <jk>new</jk> ArrayList<Number>(); + <jk>final</jk> List<String> yList = <jk>new</jk> ArrayList<String>(); + + String responseText = restClient.doGet(<jsf>URL</jsf>) + .addResponsePattern( + <jk>new</jk> ResponsePattern(<js>"x=(\\d+)"</js>) { + <ja>@Override</ja> + <jk>public void</jk> onMatch(RestCall restCall, Matcher m) <jk>throws</jk> RestCallException { + xList.add(Integer.<jsm>parseInt</jsm>(m.group(1))); + } + <ja>@Override</ja> + <jk>public void</jk> onNoMatch(RestCall restCall) <jk>throws</jk> RestCallException { + <jk>throw new</jk> RestCallException(<js>"No X's found!"</js>); + } + } + ) + .addResponsePattern( + <jk>new</jk> ResponsePattern(<js>"y=(\\S+)"</js>) { + <ja>@Override</ja> + <jk>public void</jk> onMatch(RestCall restCall, Matcher m) <jk>throws</jk> RestCallException { + yList.add(m.group(1)); + } + <ja>@Override</ja> + <jk>public void</jk> onNoMatch(RestCall restCall) <jk>throws</jk> RestCallException { + <jk>throw new</jk> RestCallException(<js>"No Y's found!"</js>); + } + } + ) + .getResponseAsString(); + </p> + <p> + Using response patterns does not affect the functionality of any of the other methods + used to retrieve the response such as {@link org.apache.juneau.client.RestCall#getResponseAsString()} or {@link org.apache.juneau.client.RestCall#getResponse(Class)}.<br> + HOWEVER, if you want to retrieve the entire text of the response from inside the match methods, + use {@link org.apache.juneau.client.RestCall#getCapturedResponse()} since this method will not absorb the response for those other methods. + </p> + </div> + + <!-- ======================================================================================================== --> + <a id="#PipingOutput"></a> + <h3 class='topic' onclick='toggle(this)'>1.4 - Piping Response Output</h3> + <div class='topic'> + <p> + The {@link org.apache.juneau.client.RestCall} class provides various convenience <code>pipeTo()</code> methods + to pipe output to output streams and writers. + </p> + <p> + If you want to pipe output without any intermediate buffering, you can use the {@link org.apache.juneau.client.RestCall#byLines()} method. + This will cause the output to be piped and flushed after every line. + This can be useful if you want to display the results in real-time from a long running process producing + output on a REST call. + </p> + <h6 class='topic'>Example:</h6> + <p class='bcode'> + <jc>// Pipe output from REST call to System.out in real-time.</jc> + restClient.doPost(<jsf>URL</jsf>).byLines().pipeTo(<jk>new</jk> PrintWriter(System.<jk>out</jk>)).run(); + </p> + </div> + + <!-- ======================================================================================================== --> + <a id="Logging"></a> + <h3 class='topic' onclick='toggle(this)'>1.5 - Logging</h3> + <div class='topic'> + <p> + Use the {@link org.apache.juneau.client.RestClient#logTo(Level,Logger)} and {@link org.apache.juneau.client.RestCall#logTo(Level,Logger)} methods + to log HTTP calls. + These methods will cause the HTTP request and response headers and body to be logged to the specified logger. + </p> + <h6 class='topic'>Example:</h6> + <p class='bcode'> + <jc>// Log the HTTP request/response to the specified logger.</jc> + <jk>int</jk> rc = restClient.doGet(<jsf>URL</jsf>).logTo(<jsf>INFO</jsf>, getLogger()).run(); + </p> + <p> + The method call is ignored if the logger level is below the specified level. + </p> + <p> + Customized logging can be handled by subclassing the {@link org.apache.juneau.client.RestCallLogger} class and using the + {@link org.apache.juneau.client.RestCall#addInterceptor(RestCallInterceptor)} method. + </p> + </div> + + <!-- ======================================================================================================== --> + <a id="Interceptors"></a> + <h3 class='topic' onclick='toggle(this)'>1.6 - Interceptors</h3> + <div class='topic'> + <p> + The {@link org.apache.juneau.client.RestClient#addInterceptor(RestCallInterceptor)} and {@link org.apache.juneau.client.RestCall#addInterceptor(RestCallInterceptor)} methods + can be used to intercept responses during specific connection lifecycle events. + </p> + <p> + The {@link org.apache.juneau.client.RestCallLogger} class is an example of an interceptor that uses the various lifecycle methods + to log HTTP requests. + </p> + <p class='bcode'> + <jd>/** + * Specialized interceptor for logging calls to a log file. + */</jd> + <jk>public class</jk> RestCallLogger <jk>extends</jk> RestCallInterceptor { + + <jk>private</jk> Level <jf>level</jf>; + <jk>private</jk> Logger <jf>log</jf>; + + <jd>/** + * Constructor. + * + * <ja>@param</ja> level The log level to log messages at. + * <ja>@param</ja> log The logger to log to. + */</jd> + <jk>protected</jk> RestCallLogger(Level level, Logger log) { + <jk>this</jk>.<jf>level</jf> = level; + <jk>this</jk>.<jf>log</jf> = log; + } + + <ja>@Override</ja> <jc>/* RestCallInterceptor */</jc> + <jk>public void</jk> onInit(RestCall restCall) { + <jk>if</jk> (<jf>log</jf>.isLoggable(<jf>level</jf>)) + restCall.captureResponse(); + } + + <ja>@Override</ja> <jc>/* RestCallInterceptor */</jc> + <jk>public void</jk> onConnect(RestCall restCall, <jk>int</jk> statusCode, HttpRequest req, HttpResponse res) { + <jc>// Do nothing.</jc> + } + + <ja>@Override</ja> <jc>/* RestCallInterceptor */</jc> + <jk>public void</jk> onRetry(RestCall restCall, <jk>int</jk> statusCode, HttpRequest req, HttpResponse res) { + <jk>if</jk> (<jf>log</jf>.isLoggable(<jf>level</jf>)) + <jf>log</jf>.log(level, MessageFormat.<jsm>format</jsm>(<js>"Call to {0} returned {1}. Will retry."</js>, req.getRequestLine().getUri(), statusCode)); + } + + <ja>@Override</ja> <jc>/* RestCallInterceptor */</jc> + <jk>public void</jk> onClose(RestCall restCall) <jk>throws</jk> RestCallException { + <jk>try</jk> { + <jk>if</jk> (<jf>log</jf>.isLoggable(<jf>level</jf>)) { + String output = restCall.getCapturedResponse(); + StringBuilder sb = <jk>new</jk> StringBuilder(); + HttpUriRequest req = restCall.getRequest(); + HttpResponse res = restCall.getResponse(); + <jk>if</jk> (req != <jk>null</jk>) { + sb.append(<js>"\n=== HTTP Call =================================================================="</js>); + + sb.append(<js>"\n=== REQUEST ===\n"</js>).append(req); + sb.append(<js>"\n---request headers---"</js>); + <jk>for</jk> (Header h : req.getAllHeaders()) + sb.append(<js>"\n"</js>).append(h); + <jk>if</jk> (req <jk>instanceof</jk> HttpEntityEnclosingRequestBase) { + sb.append(<js>"\n---request entity---"</js>); + HttpEntityEnclosingRequestBase req2 = (HttpEntityEnclosingRequestBase)req; + HttpEntity e = req2.getEntity(); + <jk>if</jk> (e == <jk>null</jk>) + sb.append(<js>"\nEntity is null"</js>); + <jk>else</jk> { + <jk>if</jk> (e.getContentType() != <jk>null</jk>) + sb.append(<js>"\n"</js>).append(e.getContentType()); + <jk>if</jk> (e.getContentEncoding() != <jk>null</jk>) + sb.append(<js>"\n"</js>).append(e.getContentEncoding()); + <jk>if</jk> (e.isRepeatable()) { + <jk>try</jk> { + sb.append(<js>"\n---request content---\n"</js>).append(EntityUtils.<jsm>toString</jsm>(e)); + } <jk>catch</jk> (Exception ex) { + <jk>throw new</jk> RuntimeException(ex); + } + } + } + } + } + <jk>if</jk> (res != <jk>null</jk>) { + sb.append(<js>"\n=== RESPONSE ===\n"</js>).append(res.getStatusLine()); + sb.append(<js>"\n---response headers---"</js>); + <jk>for</jk> (Header h : res.getAllHeaders()) + sb.append(<js>"\n"</js>).append(h); + sb.append(<js>"\n---response content---\n"</js>).append(output); + sb.append(<js>"\n=== END ========================================================================"</js>); + } + <jf>log</jf>.log(<jf>level</jf>, sb.toString()); + } + } <jk>catch</jk> (IOException e) { + <jf>log</jf>.log(Level.<jsf>SEVERE</jsf>, e.getLocalizedMessage(), e); + } + } + } + </p> + </div> + + <!-- ======================================================================================================== --> + <a id="Remoteable"></a> + <h3 class='topic' onclick='toggle(this)'>1.7 - Remotable Proxies</h3> + <div class='topic'> + <p> + Juneau provides the capability of calling methods on POJOs on a server through client-side proxy interfaces. + It offers a number of advantages over other similar remote proxy interfaces, such as being much simpler to + use and allowing much more flexibility. + </p> + <p> + Proxy interfaces are retrieved using the {@link org.apache.juneau.client.RestClient#getRemoteableProxy(Class)} method. + The {@link org.apache.juneau.client.RestClient#setRemoteableServletUri(String)} method is used to specify the location + of the remoteable services servlet running on the server. + The remoteable servlet is a specialized subclass of {@link org.apache.juneau.server.RestServlet} that provides a full-blown + REST interface for calling interfaces remotely. + </p> + <p> + In this example, we have the following interface defined that we want to call from the client side against + a POJO on the server side (i.e. a Remoteable Service)... + <p class='bcode'> + <jk>public interface</jk> IAddressBook { + Person createPerson(CreatePerson cp) <jk>throws</jk> Exception; + } + </p> + <p> + The client side code for invoking this method is shown below... + </p> + <p class='bcode'> + <jc>// Create a RestClient using JSON for serialization, and point to the server-side remoteable servlet.</jc> + RestClient client = <jk>new</jk> RestClient(JsonSerializer.<jk>class</jk>, JsonParser.<jk>class</jk>) + .setRemoteableServletUri(<js>"https://localhost:9080/juneau/sample/remoteable";</js>); + + <jc>// Create a proxy interface.</jc> + IAddressBook ab = client.getRemoteableProxy(IAddressBook.<jk>class</jk>); + + <jc>// Invoke a method on the server side and get the returned result.</jc> + Person p = ab.createPerson( + <jk>new</jk> CreatePerson(<js>"Test Person"</js>, + AddressBook.<jsm>toCalendar</jsm>(<js>"Aug 1, 1999"</js>), + <jk>new</jk> CreateAddress(<js>"Test street"</js>, <js>"Test city"</js>, <js>"Test state"</js>, 12345, <jk>true</jk>)) + ); + </p> + <p> + The requirements for a method to be callable through a remoteable service are: + <ul class='spaced-list'> + <li>The method must be public. + <li>The parameter and return types must be <a href='../../../../org/apache/juneau/package-summary.html#PojoCategories'><u>serializable and parsable</u></a>. + </ul> + </p> + <p> + One significant feature is that the remoteable services servlet is a full-blown REST interface. + Therefore, in cases where the interface classes are not available on the client side, + the same method calls can be made through pure REST calls. + This can also aid significantly in debugging since calls to the remoteable service + can be called directly from a browser with no code involved. + </p> + <p> + See {@link org.apache.juneau.server.remoteable} for more information. + </p> + </div> + + <!-- ======================================================================================================== --> + <a id="Other"></a> + <h3 class='topic' onclick='toggle(this)'>1.8 - Other Useful Methods</h3> + <div class='topic'> + <p> + The {@link org.apache.juneau.client.RestClient#setRootUrl(String)} method can be used to specify a root URL on + all requests so that you don't have to use absolute paths on individual calls. + </p> + <p class='bcode'> + <jc>// Create a rest client with a root URL</jc> + RestClient rc = <jk>new</jk> RestClient().setRootUrl(<js>"http://localhost:9080/foobar";</js>); + String r = rc.doGet(<js>"/baz"</js>).getResponseAsString(); <jc>// Gets "http://localhost:9080/foobar/baz";</jc> + </p> + <p> + The {@link org.apache.juneau.client.RestClient#setProperty(String,Object)} method can be used to set serializer + and parser properties. + For example, if you're parsing a response into POJOs and you want to ignore fields that aren't on the + POJOs, you can use the {@link org.apache.juneau.BeanContext#BEAN_ignoreUnknownBeanProperties} property. + </p> + <p class='bcode'> + <jc>// Create a rest client that ignores unknown fields in the response</jc> + RestClient rc = <jk>new</jk> RestClient(JsonSerializer.<jk>class</jk>, JsonParser.<jk>class</jk>) + .setProperty(<jsf>BEAN_ignoreUnknownBeanProperties</jsf>, <jk>true</jk>); + MyPojo myPojo = rc.doGet(<jsf>URL</jsf>).getResponse(MyPojo.<jk>class</jk>); + </p> + <p> + The {@link org.apache.juneau.client.RestCall#setRetryable(int,long,RetryOn)} method can be used to automatically + retry requests on failures. + This can be particularly useful if you're attempting to connect to a REST resource that may be in + the process of still initializing. + </p> + <p class='bcode'> + <jc>// Create a rest call that retries every 10 seconds for up to 30 minutes as long as a connection fails + // or a 400+ is received.</jc> + restClient.doGet(<jsf>URL</jsf>) + .setRetryable(180, 10000, RetryOn.<jsf>DEFAULT</jsf>) + .run(); + </p> + </div> +</div> +</body> +</html> \ No newline at end of file
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+org.eclipse.jdt.core.formatter.insert_space_before_comma_in_for_increments=do not insert +org.eclipse.jdt.core.formatter.insert_space_before_comma_in_for_inits=do not insert +org.eclipse.jdt.core.formatter.insert_space_before_comma_in_method_declaration_parameters=do not insert +org.eclipse.jdt.core.formatter.insert_space_before_comma_in_method_declaration_throws=do not insert +org.eclipse.jdt.core.formatter.insert_space_before_comma_in_method_invocation_arguments=do not insert +org.eclipse.jdt.core.formatter.insert_space_before_comma_in_multiple_field_declarations=do not insert +org.eclipse.jdt.core.formatter.insert_space_before_comma_in_multiple_local_declarations=do not insert +org.eclipse.jdt.core.formatter.insert_space_before_comma_in_parameterized_type_reference=do not insert +org.eclipse.jdt.core.formatter.insert_space_before_comma_in_superinterfaces=do not insert +org.eclipse.jdt.core.formatter.insert_space_before_comma_in_type_arguments=do not insert +org.eclipse.jdt.core.formatter.insert_space_before_comma_in_type_parameters=do not insert +org.eclipse.jdt.core.formatter.insert_space_before_ellipsis=do not insert +org.eclipse.jdt.core.formatter.insert_space_before_opening_angle_bracket_in_parameterized_type_reference=do not insert +org.eclipse.jdt.core.formatter.insert_space_before_opening_angle_bracket_in_type_arguments=do not insert +org.eclipse.jdt.core.formatter.insert_space_before_opening_angle_bracket_in_type_parameters=do not insert +org.eclipse.jdt.core.formatter.insert_space_before_opening_brace_in_annotation_type_declaration=insert +org.eclipse.jdt.core.formatter.insert_space_before_opening_brace_in_anonymous_type_declaration=insert +org.eclipse.jdt.core.formatter.insert_space_before_opening_brace_in_array_initializer=insert +org.eclipse.jdt.core.formatter.insert_space_before_opening_brace_in_block=insert +org.eclipse.jdt.core.formatter.insert_space_before_opening_brace_in_constructor_declaration=insert +org.eclipse.jdt.core.formatter.insert_space_before_opening_brace_in_enum_constant=insert +org.eclipse.jdt.core.formatter.insert_space_before_opening_brace_in_enum_declaration=insert +org.eclipse.jdt.core.formatter.insert_space_before_opening_brace_in_method_declaration=insert +org.eclipse.jdt.core.formatter.insert_space_before_opening_brace_in_switch=insert +org.eclipse.jdt.core.formatter.insert_space_before_opening_brace_in_type_declaration=insert +org.eclipse.jdt.core.formatter.insert_space_before_opening_bracket_in_array_allocation_expression=do not insert +org.eclipse.jdt.core.formatter.insert_space_before_opening_bracket_in_array_reference=do not insert +org.eclipse.jdt.core.formatter.insert_space_before_opening_bracket_in_array_type_reference=do not insert +org.eclipse.jdt.core.formatter.insert_space_before_opening_paren_in_annotation=do not insert +org.eclipse.jdt.core.formatter.insert_space_before_opening_paren_in_annotation_type_member_declaration=do not insert +org.eclipse.jdt.core.formatter.insert_space_before_opening_paren_in_catch=insert +org.eclipse.jdt.core.formatter.insert_space_before_opening_paren_in_constructor_declaration=do not insert +org.eclipse.jdt.core.formatter.insert_space_before_opening_paren_in_enum_constant=do not insert +org.eclipse.jdt.core.formatter.insert_space_before_opening_paren_in_for=insert +org.eclipse.jdt.core.formatter.insert_space_before_opening_paren_in_if=insert +org.eclipse.jdt.core.formatter.insert_space_before_opening_paren_in_method_declaration=do not insert +org.eclipse.jdt.core.formatter.insert_space_before_opening_paren_in_method_invocation=do not insert +org.eclipse.jdt.core.formatter.insert_space_before_opening_paren_in_parenthesized_expression=do not insert +org.eclipse.jdt.core.formatter.insert_space_before_opening_paren_in_switch=insert +org.eclipse.jdt.core.formatter.insert_space_before_opening_paren_in_synchronized=insert +org.eclipse.jdt.core.formatter.insert_space_before_opening_paren_in_try=insert +org.eclipse.jdt.core.formatter.insert_space_before_opening_paren_in_while=insert +org.eclipse.jdt.core.formatter.insert_space_before_parenthesized_expression_in_return=insert +org.eclipse.jdt.core.formatter.insert_space_before_parenthesized_expression_in_throw=insert +org.eclipse.jdt.core.formatter.insert_space_before_postfix_operator=do not insert +org.eclipse.jdt.core.formatter.insert_space_before_prefix_operator=do not insert +org.eclipse.jdt.core.formatter.insert_space_before_question_in_conditional=insert +org.eclipse.jdt.core.formatter.insert_space_before_question_in_wildcard=do not insert +org.eclipse.jdt.core.formatter.insert_space_before_semicolon=do not insert +org.eclipse.jdt.core.formatter.insert_space_before_semicolon_in_for=do not insert +org.eclipse.jdt.core.formatter.insert_space_before_semicolon_in_try_resources=do not insert +org.eclipse.jdt.core.formatter.insert_space_before_unary_operator=do not insert +org.eclipse.jdt.core.formatter.insert_space_between_brackets_in_array_type_reference=do not insert +org.eclipse.jdt.core.formatter.insert_space_between_empty_braces_in_array_initializer=do not insert +org.eclipse.jdt.core.formatter.insert_space_between_empty_brackets_in_array_allocation_expression=do not insert +org.eclipse.jdt.core.formatter.insert_space_between_empty_parens_in_annotation_type_member_declaration=do not insert +org.eclipse.jdt.core.formatter.insert_space_between_empty_parens_in_constructor_declaration=do not insert +org.eclipse.jdt.core.formatter.insert_space_between_empty_parens_in_enum_constant=do not insert +org.eclipse.jdt.core.formatter.insert_space_between_empty_parens_in_method_declaration=do not insert +org.eclipse.jdt.core.formatter.insert_space_between_empty_parens_in_method_invocation=do not insert +org.eclipse.jdt.core.formatter.join_lines_in_comments=true +org.eclipse.jdt.core.formatter.join_wrapped_lines=true +org.eclipse.jdt.core.formatter.keep_else_statement_on_same_line=false +org.eclipse.jdt.core.formatter.keep_empty_array_initializer_on_one_line=false +org.eclipse.jdt.core.formatter.keep_imple_if_on_one_line=false +org.eclipse.jdt.core.formatter.keep_then_statement_on_same_line=false +org.eclipse.jdt.core.formatter.lineSplit=200 +org.eclipse.jdt.core.formatter.never_indent_block_comments_on_first_column=false +org.eclipse.jdt.core.formatter.never_indent_line_comments_on_first_column=false +org.eclipse.jdt.core.formatter.number_of_blank_lines_at_beginning_of_method_body=0 +org.eclipse.jdt.core.formatter.number_of_empty_lines_to_preserve=1 +org.eclipse.jdt.core.formatter.put_empty_statement_on_new_line=true +org.eclipse.jdt.core.formatter.tabulation.char=tab +org.eclipse.jdt.core.formatter.tabulation.size=3 +org.eclipse.jdt.core.formatter.use_on_off_tags=false +org.eclipse.jdt.core.formatter.use_tabs_only_for_leading_indentations=false +org.eclipse.jdt.core.formatter.wrap_before_binary_operator=true +org.eclipse.jdt.core.formatter.wrap_before_or_operator_multicatch=true +org.eclipse.jdt.core.formatter.wrap_outer_expressions_when_nested=true
