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Library for interfacing with the Public and Incubating SolidFire Element API.
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/*
* Copyright © 2014-2016 NetApp, Inc. All Rights Reserved.
*
* 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.solidfire.client;
import com.solidfire.core.client.ApiConnectionException;
import com.solidfire.core.javautil.Optional;
import com.solidfire.element.api.GetAPIResult;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.net.*;
import java.util.ArrayList;
import java.util.List;
import static com.solidfire.core.javautil.Optional.of;
import static java.lang.String.format;
/**
* The Abstract Factory defines the version checking logic for an implementation factory
* that instantiates a ServiceBase.
*
* @param extends ServiceBase
*
* @see #checkVersion(String, Optional, String, String, Optional, boolean)
*/
public abstract class AbstractFactory {
private static final Logger log = LoggerFactory.getLogger(AbstractFactory.class);
private static final String IP4_ADDRESS_REGEX = "^\\d{1,3}\\.\\d{1,3}\\.\\d{1,3}\\.\\d{1,3}$";
/**
* Getter for property 'minApiVersion'.
*
* @return Value for property 'minApiVersion'.
*/
protected abstract double getMinApiVersion();
/**
* Initializes the ServiceBase with a given RequestDispatcher.
*
* @param requestDispatcher the instantiated RequestBuilder
* @return the initialized ServiceBase
*/
protected abstract T toServiceBase(final com.solidfire.core.client.RequestDispatcher requestDispatcher);
/**
*
* @param target the management virtual IP (or hostname)
* @param port the port to use
* @param username admin username
* @param password admin password
* @param apiVersion the version of the API services
* @param verifySSL if set to true, the target will be checked against the list of valid SSL hosts, including verification of the
* validity of the Cert recorded for a given target, otherwise these validity checks are ignored, which is useful
* when the target is an IP address.
* @return an initialized RequestBuilder
*/
protected com.solidfire.core.client.RequestDispatcher buildRequestDispatcher(String target, Optional port, String username, String password, Optional apiVersion, boolean verifySSL) {
final URL endpoint;
if (apiVersion.isPresent()) {
final double version;
try {
version = Double.valueOf(apiVersion.get());
endpoint = toEndpoint(target, port, version);
} catch (NullPointerException | NumberFormatException e) {
throw new com.solidfire.core.client.ApiException("Unable to determine version to connect from value: " + apiVersion.get());
}
} else {
endpoint = toEndpoint(target, port, getMinApiVersion());
}
final com.solidfire.core.client.RequestDispatcher requestDispatcher;
if (verifySSL) {
requestDispatcher = new com.solidfire.core.client.HttpsRequestDispatcher(endpoint, username, password);
} else {
requestDispatcher = new com.solidfire.core.client.HttpsRequestDispatcherWithoutSSLVerification(endpoint, username, password);
}
return requestDispatcher;
}
/**
* Checks if the provided target is in the form of an IP address or a hostname. Depending on the value of verifySSL, this method
* will throw an ApiException because IP addresses will not have a proper SSL certificate.
* @param target the management virtual IP (or hostname)
* @param verifySSL if set to true, the target will be checked against the list of valid SSL hosts, including verification of the
* validity of the Cert recorded for a given target, otherwise these validity checks are ignored, which is useful
* when the target is an IP address.
* @throws com.solidfire.core.client.ApiException when target is in the form of an IP address and verifySSL is true.
*/
protected static void testTargetFormat(String target, boolean verifySSL) {
if (target.matches(IP4_ADDRESS_REGEX) && verifySSL) {
throw new com.solidfire.core.client.ApiException("Cannot verify SSL when target is an IP address. Set verifySSL to false or use a fully qualified domain name.");
}
}
/**
* Creates a URL representation of a SolidFire API endpoint, depending on the optional value of port, in the form:
*
* https://{target}:{port}/json-rpc/{apiVersion}
* or
* https://{target}/json-rpc/{apiVersion}
*
*
* @param target the management virtual IP (or hostname)
* @param port (optional) the port to use
* @param apiVersion the version of the API services
* @return URL representing the SolidFire API endpoint
*/
protected static URL toEndpoint(String target, Optional port, double apiVersion) {
try {
if (port.isPresent()) {
return new URL("https", target, port.get(), "/json-rpc/" + apiVersion);
} else {
return new URL("https", target, "/json-rpc/" + apiVersion);
}
} catch (MalformedURLException mue) {
// Can't actually happen
throw new RuntimeException(mue);
}
}
/**
* Checks the version of an endpoint against the target endpoint. If the version is malformed, lower then the minimally supported version, or
* the version is not supported on the cluster, an exception is thrown. If the version provided is higher the the maximum supported version
* for the SDK, a warning is generated, but the ServiceBase implementation is returned. If a version is not supplied, either the highest
* supported version of the Cluster or the maximum supported version of the Cluster, which ever is lower, is used.
*
* @param target the management virtual IP (or hostname)
* @param port (optional) the port to use
* @param username admin username
* @param password admin password
* @param version (optional) the requested supported version of the SolidFire Cluster
* @param verifySSL if set to true, the target will be checked against the list of valid SSL hosts, including verification of the
* validity of the Cert recorded for a given target, otherwise these validity checks are ignored, which is useful
* when the target is an IP address.
* @return T the implementation of ServiceBase initialized with the properly constructed RequestDispatcher
*/
protected T checkVersion(String target, Optional port, String username, String password, Optional version, boolean verifySSL) {
testTargetFormat(target, verifySSL);
final com.solidfire.core.client.RequestDispatcher dispatcher;
final T element = toServiceBase(buildRequestDispatcher(target, port, username, password, of(getMinApiVersion()+""), verifySSL));
GetAPIResult getAPIResult = null;
try {
getAPIResult = element.sendRequest("GetAPI", null, null, GetAPIResult.class);
}
catch (NullPointerException e) {
throw new com.solidfire.core.client.ApiException("400 Bad Request");
}
catch (ApiConnectionException e){
throw new com.solidfire.core.client.ApiConnectionException("Bad Credentials.", e.getCause());
}
catch (com.solidfire.core.client.ApiException e){
if (e.getCause() instanceof UnknownHostException){
throw new com.solidfire.core.client.ApiException("Unknown host based on target.", e.getCause());
}
else if (e.getCause() instanceof SocketTimeoutException){
throw new com.solidfire.core.client.ApiException("Connection timed out.", e.getCause());
}
else if (e.getCause() instanceof ConnectException){
throw new com.solidfire.core.client.ApiException("Connection refused. Confirm your target is a SolidFire cluster or node.", e.getCause());
}
else {
throw new com.solidfire.core.client.ApiException("Connection failed.", e.getCause());
}
}
if (version.isPresent()) {
final double versionActual;
try {
versionActual = Double.valueOf(version.get());
} catch (NullPointerException | NumberFormatException e) {
throw new com.solidfire.core.client.ApiException("Unable to determine version to connect from value: " + version.get());
}
if (versionActual < getMinApiVersion()) {
throw new com.solidfire.core.client.ApiException(format("Cannot connect to a version lower than supported by the SDK. Connect at %1$.1f or higher.", getMinApiVersion()));
}
final List supportedVersions = new ArrayList<>();
for (final double apiVersion : getAPIResult.getSupportedVersions()) {
if (apiVersion >= getMinApiVersion()) {
supportedVersions.add(apiVersion);
}
}
if (supportedVersions.contains(versionActual)) {
dispatcher = buildRequestDispatcher(target, port, username, password, of(versionActual + ""), verifySSL);
} else {
throw new com.solidfire.core.client.ApiException(format("Invalid version to connect on this cluster. Valid versions are: %s", join(supportedVersions, ", ", "or")));
}
} else {
dispatcher = buildRequestDispatcher(target, port, username, password, of(getAPIResult.getCurrentVersion() + ""), verifySSL);
}
return toServiceBase(dispatcher);
}
//* Simple join list of strings method used for pretty documentation formatting *//
private static String join(final List list, final String delim, final String endingConjunction) {
final StringBuilder sb = new StringBuilder();
String tempDelim = "";
for (Object i : list) {
sb.append(tempDelim).append(i);
tempDelim = delim;
}
final String result = sb.toString();
final int lastDelim = result.lastIndexOf(delim);
final String returnedResult;
if (lastDelim == -1 || endingConjunction.trim().length() == 0) {
returnedResult = result;
} else {
returnedResult = result.substring(0, lastDelim + 1) + " " + endingConjunction + result.substring(lastDelim + 1);
}
return returnedResult;
}
}